78816925 has 24 divisors (see below), whose sum is σ = 110305440. Its totient is φ = 55339200.

The previous prime is 78816923. The next prime is 78816931. The reversal of 78816925 is 52961887.

It is not a de Polignac number, because 78816925 - 2¹ = 78816923 is a prime.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78816923) 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, 3034 + ... + 12916.

It is an arithmetic number, because the mean of its divisors is an integer number (4596060).

Almost surely, 2^78816925 is an apocalyptic number.

It is an amenable number.

78816925 is a deficient number, since it is larger than the sum of its proper divisors (31488515).

78816925 is a wasteful number, since it uses less digits than its factorization.

78816925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9933 (or 9928 counting only the distinct ones).

The product of its digits is 241920, while the sum is 46.

The square root of 78816925 is about 8877.8896704115. The cubic root of 78816925 is about 428.7523324905.

The spelling of 78816925 in words is "seventy-eight million, eight hundred sixteen thousand, nine hundred twenty-five".