861475264 has 28 divisors (see below), whose sum is σ = 1840990984. Its totient is φ = 397603584.

The previous prime is 861475249. The next prime is 861475319. The reversal of 861475264 is 462574168.

It is a self number, because there is not a number n which added to its sum of digits gives 861475264.

It is a congruent 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, 516882 + ... + 518545.

It is an arithmetic number, because the mean of its divisors is an integer number (65749678).

Almost surely, 2^861475264 is an apocalyptic number.

It is an amenable number.

861475264 is an abundant number, since it is smaller than the sum of its proper divisors (979515720).

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

861475264 is a wasteful number, since it uses less digits than its factorization.

861475264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035452 (or 1035442 counting only the distinct ones).

The product of its digits is 322560, while the sum is 43.

The square root of 861475264 is about 29350.8988618747. The cubic root of 861475264 is about 951.5120018530.

The spelling of 861475264 in words is "eight hundred sixty-one million, four hundred seventy-five thousand, two hundred sixty-four".