78925640 has 32 divisors (see below), whose sum is σ = 181716480. Its totient is φ = 30835392.

The previous prime is 78925631. The next prime is 78925663. The reversal of 78925640 is 4652987.

It is a super-3 number, since 3×78925640³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21224 + ... + 24663.

It is an arithmetic number, because the mean of its divisors is an integer number (5678640).

Almost surely, 2^78925640 is an apocalyptic number.

It is an amenable number.

78925640 is an abundant number, since it is smaller than the sum of its proper divisors (102790840).

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

78925640 is a wasteful number, since it uses less digits than its factorization.

78925640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45941 (or 45937 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 78925640 is about 8884.0103556896. The cubic root of 78925640 is about 428.9493730590.

The spelling of 78925640 in words is "seventy-eight million, nine hundred twenty-five thousand, six hundred forty".