78696520 has 64 divisors (see below), whose sum is σ = 206219520. Its totient is φ = 26467584.

The previous prime is 78696509. The next prime is 78696571. The reversal of 78696520 is 2569687.

It is a super-2 number, since 2×78696520² = 12386284520220800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12189 + ... + 17491.

It is an arithmetic number, because the mean of its divisors is an integer number (3222180).

Almost surely, 2^78696520 is an apocalyptic number.

78696520 is a gapful number since it is divisible by the number (70) 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 78696520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103109760).

78696520 is an abundant number, since it is smaller than the sum of its proper divisors (127523000).

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

78696520 is a wasteful number, since it uses less digits than its factorization.

78696520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5374 (or 5370 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 78696520 is about 8871.1059062554. The cubic root of 78696520 is about 428.5338927972.

The spelling of 78696520 in words is "seventy-eight million, six hundred ninety-six thousand, five hundred twenty".