864166628 has 72 divisors (see below), whose sum is σ = 1704447360. Its totient is φ = 382911360.

The previous prime is 864166609. The next prime is 864166651. The reversal of 864166628 is 826661468.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1874318 + ... + 1874778.

It is an arithmetic number, because the mean of its divisors is an integer number (23672880).

Almost surely, 2^864166628 is an apocalyptic number.

It is an amenable number.

864166628 is a deficient number, since it is larger than the sum of its proper divisors (840280732).

864166628 is a wasteful number, since it uses less digits than its factorization.

864166628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 597 (or 582 counting only the distinct ones).

The product of its digits is 663552, while the sum is 47.

The square root of 864166628 is about 29396.7111765925. The cubic root of 864166628 is about 952.5018553616.

The spelling of 864166628 in words is "eight hundred sixty-four million, one hundred sixty-six thousand, six hundred twenty-eight".