860913978 has 16 divisors (see below), whose sum is σ = 1812450720. Its totient is φ = 271867536.

The previous prime is 860913929. The next prime is 860914037. The reversal of 860913978 is 879319068.

It is a super-3 number, since 3×860913978³ (a number of 28 digits) contains 333 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 860913978.

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, 3775825 + ... + 3776052.

It is an arithmetic number, because the mean of its divisors is an integer number (113278170).

Almost surely, 2^860913978 is an apocalyptic number.

860913978 is an abundant number, since it is smaller than the sum of its proper divisors (951536742).

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

860913978 is a wasteful number, since it uses less digits than its factorization.

860913978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7551901.

The product of its (nonzero) digits is 653184, while the sum is 51.

The square root of 860913978 is about 29341.3356546698. The cubic root of 860913978 is about 951.3053074303.

The spelling of 860913978 in words is "eight hundred sixty million, nine hundred thirteen thousand, nine hundred seventy-eight".