78855688 has 16 divisors (see below), whose sum is σ = 147962880. Its totient is φ = 39398928.

The previous prime is 78855659. The next prime is 78855703. The reversal of 78855688 is 88655887.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11881 + ... + 17287.

It is an arithmetic number, because the mean of its divisors is an integer number (9247680).

Almost surely, 2^78855688 is an apocalyptic number.

It is an amenable number.

78855688 is a deficient number, since it is larger than the sum of its proper divisors (69107192).

78855688 is a wasteful number, since it uses less digits than its factorization.

78855688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7236 (or 7232 counting only the distinct ones).

The product of its digits is 4300800, while the sum is 55.

The square root of 78855688 is about 8880.0725222264. The cubic root of 78855688 is about 428.8226092863.

The spelling of 78855688 in words is "seventy-eight million, eight hundred fifty-five thousand, six hundred eighty-eight".