864745940 has 24 divisors (see below), whose sum is σ = 1816668000. Its totient is φ = 345764768.

The previous prime is 864745913. The next prime is 864745951. The reversal of 864745940 is 49547468.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57311 + ... + 70809.

It is an arithmetic number, because the mean of its divisors is an integer number (75694500).

Almost surely, 2^864745940 is an apocalyptic number.

It is an amenable number.

864745940 is an abundant number, since it is smaller than the sum of its proper divisors (951922060).

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

864745940 is a wasteful number, since it uses less digits than its factorization.

864745940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16711 (or 16709 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 47.

The square root of 864745940 is about 29406.5628729371. The cubic root of 864745940 is about 952.7146509345.

The spelling of 864745940 in words is "eight hundred sixty-four million, seven hundred forty-five thousand, nine hundred forty".