78735904 has 48 divisors (see below), whose sum is σ = 170529408. Its totient is φ = 35557632.

The previous prime is 78735887. The next prime is 78735911. The reversal of 78735904 is 40953787.

It is a happy number.

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, 17539 + ... + 21565.

It is an arithmetic number, because the mean of its divisors is an integer number (3552696).

Almost surely, 2^78735904 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 78735904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85264704).

78735904 is an abundant number, since it is smaller than the sum of its proper divisors (91793504).

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

78735904 is a wasteful number, since it uses less digits than its factorization.

78735904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097 (or 4089 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 78735904 is about 8873.3254194806. The cubic root of 78735904 is about 428.6053680635.

The spelling of 78735904 in words is "seventy-eight million, seven hundred thirty-five thousand, nine hundred four".