Search a number
-
+
68801880 = 23357211701
BaseRepresentation
bin1000001100111…
…01010101011000
311210110111102210
410012131111120
5120103130010
610454355120
71463543400
oct406352530
9153414383
1068801880
1135922964
121b05baa0
131133c394
1491cd800
156090b20
hex419d558

68801880 has 96 divisors (see below), whose sum is σ = 240125040. Its totient is φ = 15724800.

The previous prime is 68801867. The next prime is 68801881. The reversal of 68801880 is 8810886.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68801881) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30 + ... + 11730.

Almost surely, 268801880 is an apocalyptic number.

68801880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68801880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120062520).

68801880 is an abundant number, since it is smaller than the sum of its proper divisors (171323160).

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

68801880 is a wasteful number, since it uses less digits than its factorization.

68801880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11729 (or 11718 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 39.

The square root of 68801880 is about 8294.6898676201. The cubic root of 68801880 is about 409.7636551790.

The spelling of 68801880 in words is "sixty-eight million, eight hundred one thousand, eight hundred eighty".

Divisors: 1 2 3 4 5 6 7 8 10 12 14 15 20 21 24 28 30 35 40 42 49 56 60 70 84 98 105 120 140 147 168 196 210 245 280 294 392 420 490 588 735 840 980 1176 1470 1960 2940 5880 11701 23402 35103 46804 58505 70206 81907 93608 117010 140412 163814 175515 234020 245721 280824 327628 351030 409535 468040 491442 573349 655256 702060 819070 982884 1146698 1228605 1404120 1638140 1720047 1965768 2293396 2457210 2866745 3276280 3440094 4586792 4914420 5733490 6880188 8600235 9828840 11466980 13760376 17200470 22933960 34400940 68801880