78556086 has 48 divisors (see below), whose sum is σ = 202984704. Its totient is φ = 21467952.

The previous prime is 78556067. The next prime is 78556091. The reversal of 78556086 is 68065587.

78556086 is a `hidden beast` number, since 7 + 8 + 5 + 560 + 86 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10656 + ... + 16451.

It is an arithmetic number, because the mean of its divisors is an integer number (4228848).

Almost surely, 2^78556086 is an apocalyptic number.

78556086 is an abundant number, since it is smaller than the sum of its proper divisors (124428618).

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

78556086 is a wasteful number, since it uses less digits than its factorization.

78556086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27145 (or 27142 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 45.

The square root of 78556086 is about 8863.1871242798. The cubic root of 78556086 is about 428.2788346670.

The spelling of 78556086 in words is "seventy-eight million, five hundred fifty-six thousand, eighty-six".