Search a number
-
+
70889808 = 24311316171
BaseRepresentation
bin1000011100110…
…11000101010000
311221101120112110
410032123011100
5121121433213
611011225320
71520360553
oct416330520
9157346473
1070889808
1137019620
121b8a8240
13118c0842
1495b469a
1563545c3
hex439b150

70889808 has 160 divisors (see below), whose sum is σ = 212557824. Its totient is φ = 20160000.

The previous prime is 70889807. The next prime is 70889851. The reversal of 70889808 is 80898807.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70889807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 998413 + ... + 998483.

Almost surely, 270889808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 70889808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106278912).

70889808 is an abundant number, since it is smaller than the sum of its proper divisors (141668016).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

70889808 is a wasteful number, since it uses less digits than its factorization.

70889808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 179 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 48.

The square root of 70889808 is about 8419.6085419692. The cubic root of 70889808 is about 413.8674457195.

The spelling of 70889808 in words is "seventy million, eight hundred eighty-nine thousand, eight hundred eight".

Divisors: 1 2 3 4 6 8 11 12 16 22 24 31 33 44 48 61 62 66 71 88 93 122 124 132 142 176 183 186 213 244 248 264 284 341 366 372 426 488 496 528 568 671 682 732 744 781 852 976 1023 1136 1342 1364 1464 1488 1562 1704 1891 2013 2046 2201 2343 2684 2728 2928 3124 3408 3782 4026 4092 4331 4402 4686 5368 5456 5673 6248 6603 7564 8052 8184 8662 8804 9372 10736 11346 12496 12993 13206 15128 16104 16368 17324 17608 18744 20801 22692 24211 25986 26412 30256 32208 34648 35216 37488 41602 45384 47641 48422 51972 52824 62403 69296 72633 83204 90768 95282 96844 103944 105648 124806 134261 142923 145266 166408 190564 193688 207888 249612 268522 285846 290532 332816 381128 387376 402783 499224 537044 571692 581064 762256 805566 998448 1074088 1143384 1162128 1476871 1611132 2148176 2286768 2953742 3222264 4430613 5907484 6444528 8861226 11814968 17722452 23629936 35444904 70889808