865829864 has 32 divisors (see below), whose sum is σ = 1665256320. Its totient is φ = 421842816.

The previous prime is 865829819. The next prime is 865829879. The reversal of 865829864 is 468928568.

It is a super-2 number, since 2×865829864² = 1499322706788516992, which contains 22 as substring.

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, 82667 + ... + 92549.

It is an arithmetic number, because the mean of its divisors is an integer number (52039260).

Almost surely, 2^865829864 is an apocalyptic number.

It is an amenable number.

865829864 is a deficient number, since it is larger than the sum of its proper divisors (799426456).

865829864 is a wasteful number, since it uses less digits than its factorization.

865829864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10169 (or 10165 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 56.

The square root of 865829864 is about 29424.9870688162. The cubic root of 865829864 is about 953.1125478033.

The spelling of 865829864 in words is "eight hundred sixty-five million, eight hundred twenty-nine thousand, eight hundred sixty-four".