78255886 has 16 divisors (see below), whose sum is σ = 119451024. Its totient is φ = 38444224.

The previous prime is 78255871. The next prime is 78255917. The reversal of 78255886 is 68855287.

It is a happy number.

It is a super-2 number, since 2×78255886² = 12247967387289992, which contains 22 as substring.

It is a congruent 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, 31506 + ... + 33898.

It is an arithmetic number, because the mean of its divisors is an integer number (7465689).

Almost surely, 2^78255886 is an apocalyptic number.

78255886 is a deficient number, since it is larger than the sum of its proper divisors (41195138).

78255886 is a wasteful number, since it uses less digits than its factorization.

78255886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2675.

The product of its digits is 1075200, while the sum is 49.

The square root of 78255886 is about 8846.2356966113. The cubic root of 78255886 is about 427.7325861794.

The spelling of 78255886 in words is "seventy-eight million, two hundred fifty-five thousand, eight hundred eighty-six".