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80693808 = 24313891453
BaseRepresentation
bin1001100111101…
…00101000110000
312121211200002120
410303310220300
5131124200213
612001314240
71666612626
oct463645060
9177750076
1080693808
11416054a8
1223035980
1313944120
14aa07516
15713e423
hex4cf4a30

80693808 has 80 divisors (see below), whose sum is σ = 227172960. Its totient is φ = 24532992.

The previous prime is 80693807. The next prime is 80693827. The reversal of 80693808 is 80839608.

It is a super-2 number, since 2×806938082 = 13022981299081728, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 80693808.

It is not an unprimeable number, because it can be changed into a prime (80693803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54810 + ... + 56262.

It is an arithmetic number, because the mean of its divisors is an integer number (2839662).

Almost surely, 280693808 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 80693808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (113586480).

80693808 is an abundant number, since it is smaller than the sum of its proper divisors (146479152).

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

80693808 is a wasteful number, since it uses less digits than its factorization.

80693808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566 (or 1560 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 80693808 is about 8982.9732271670. The cubic root of 80693808 is about 432.1289909732.

The spelling of 80693808 in words is "eighty million, six hundred ninety-three thousand, eight hundred eight".

Divisors: 1 2 3 4 6 8 12 13 16 24 26 39 48 52 78 89 104 156 178 208 267 312 356 534 624 712 1068 1157 1424 1453 2136 2314 2906 3471 4272 4359 4628 5812 6942 8718 9256 11624 13884 17436 18512 18889 23248 27768 34872 37778 55536 56667 69744 75556 113334 129317 151112 226668 258634 302224 387951 453336 517268 775902 906672 1034536 1551804 1681121 2069072 3103608 3362242 5043363 6207216 6724484 10086726 13448968 20173452 26897936 40346904 80693808