864740 has 12 divisors (see below), whose sum is σ = 1815996. Its totient is φ = 345888.

The previous prime is 864737. The next prime is 864757. The reversal of 864740 is 47468.

864740 = 18² + 19² + ... + 137².

864740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 135424 + 729316 = 368^2 + 854^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 864740.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21599 + ... + 21638.

It is an arithmetic number, because the mean of its divisors is an integer number (151333).

2⁸⁶⁴⁷⁴⁰ is an apocalyptic number.

It is an amenable number.

864740 is an abundant number, since it is smaller than the sum of its proper divisors (951256).

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

864740 is a wasteful number, since it uses less digits than its factorization.

864740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43246 (or 43244 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 864740 is about 929.9139745159. The cubic root of 864740 is about 95.2712469508.

The spelling of 864740 in words is "eight hundred sixty-four thousand, seven hundred forty".