865264870 has 32 divisors (see below), whose sum is σ = 1634109696. Its totient is φ = 329443200.

The previous prime is 865264849. The next prime is 865264891. The reversal of 865264870 is 78462568.

It is an interprime number because it is at equal distance from previous prime (865264849) and next prime (865264891).

It is a super-2 number, since 2×865264870² = 1497366590512233800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 865264870.

It is a congruent number.

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, 3969 + ... + 41788.

It is an arithmetic number, because the mean of its divisors is an integer number (51065928).

Almost surely, 2^865264870 is an apocalyptic number.

865264870 is a deficient number, since it is larger than the sum of its proper divisors (768844826).

865264870 is a wasteful number, since it uses less digits than its factorization.

865264870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45856.

The product of its (nonzero) digits is 645120, while the sum is 46.

The square root of 865264870 is about 29415.3849201400. The cubic root of 865264870 is about 952.9051860307.

The spelling of 865264870 in words is "eight hundred sixty-five million, two hundred sixty-four thousand, eight hundred seventy".