78523916 has 12 divisors (see below), whose sum is σ = 141131088. Its totient is φ = 38200752.

The previous prime is 78523883. The next prime is 78523919. The reversal of 78523916 is 61932587.

It is not an unprimeable number, because it can be changed into a prime (78523919) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 265136 + ... + 265431.

It is an arithmetic number, because the mean of its divisors is an integer number (11760924).

Almost surely, 2^78523916 is an apocalyptic number.

It is an amenable number.

78523916 is a deficient number, since it is larger than the sum of its proper divisors (62607172).

78523916 is a wasteful number, since it uses less digits than its factorization.

78523916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530608 (or 530606 counting only the distinct ones).

The product of its digits is 90720, while the sum is 41.

The square root of 78523916 is about 8861.3721285137. The cubic root of 78523916 is about 428.2203642926.

The spelling of 78523916 in words is "seventy-eight million, five hundred twenty-three thousand, nine hundred sixteen".