864820776 has 32 divisors (see below), whose sum is σ = 2164176000. Its totient is φ = 287990400.

The previous prime is 864820757. The next prime is 864820799. The reversal of 864820776 is 677028468.

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, 8001 + ... + 42351.

It is an arithmetic number, because the mean of its divisors is an integer number (67630500).

Almost surely, 2^864820776 is an apocalyptic number.

It is an amenable number.

864820776 is an abundant number, since it is smaller than the sum of its proper divisors (1299355224).

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

864820776 is a wasteful number, since it uses less digits than its factorization.

864820776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35409 (or 35405 counting only the distinct ones).

The product of its (nonzero) digits is 903168, while the sum is 48.

The square root of 864820776 is about 29407.8352824549. The cubic root of 864820776 is about 952.7421331092.

The spelling of 864820776 in words is "eight hundred sixty-four million, eight hundred twenty thousand, seven hundred seventy-six".