78966858 has 32 divisors (see below), whose sum is σ = 163560960. Its totient is φ = 25390080.

The previous prime is 78966841. The next prime is 78966893. The reversal of 78966858 is 85866987.

It is a junction number, because it is equal to n+sod(n) for n = 78966798 and 78966807.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 84538 + ... + 85466.

It is an arithmetic number, because the mean of its divisors is an integer number (5111280).

Almost surely, 2^78966858 is an apocalyptic number.

78966858 is an abundant number, since it is smaller than the sum of its proper divisors (84594102).

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

78966858 is a wasteful number, since it uses less digits than its factorization.

78966858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422.

The product of its digits is 5806080, while the sum is 57.

The square root of 78966858 is about 8886.3298385779. The cubic root of 78966858 is about 429.0240313422.

The spelling of 78966858 in words is "seventy-eight million, nine hundred sixty-six thousand, eight hundred fifty-eight".