864796840 has 32 divisors (see below), whose sum is σ = 1959804000. Its totient is φ = 343427904.

The previous prime is 864796811. The next prime is 864796847. The reversal of 864796840 is 48697468.

It is a happy number.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (864796847) by changing a digit.

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, 72210 + ... + 83329.

It is an arithmetic number, because the mean of its divisors is an integer number (61243875).

Almost surely, 2^864796840 is an apocalyptic number.

It is an amenable number.

864796840 is an abundant number, since it is smaller than the sum of its proper divisors (1095007160).

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

864796840 is a wasteful number, since it uses less digits than its factorization.

864796840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155689 (or 155685 counting only the distinct ones).

The product of its (nonzero) digits is 2322432, while the sum is 52.

The square root of 864796840 is about 29407.4283132681. The cubic root of 864796840 is about 952.7333432163.

The spelling of 864796840 in words is "eight hundred sixty-four million, seven hundred ninety-six thousand, eight hundred forty".