864620764 has 24 divisors (see below), whose sum is σ = 1820255360. Its totient is φ = 351048816.

The previous prime is 864620753. The next prime is 864620791. The reversal of 864620764 is 467026468.

It is a self number, because there is not a number n which added to its sum of digits gives 864620764.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 812082 + ... + 813145.

Almost surely, 2^864620764 is an apocalyptic number.

It is an amenable number.

864620764 is an abundant number, since it is smaller than the sum of its proper divisors (955634596).

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

864620764 is a wasteful number, since it uses less digits than its factorization.

864620764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1625257 (or 1625255 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 43.

The square root of 864620764 is about 29404.4344274805. The cubic root of 864620764 is about 952.6686787561.

The spelling of 864620764 in words is "eight hundred sixty-four million, six hundred twenty thousand, seven hundred sixty-four".