905864 has 8 divisors (see below), whose sum is σ = 1698510. Its totient is φ = 452928.

The previous prime is 905843. The next prime is 905897. The reversal of 905864 is 468509.

It can be written as a sum of positive squares in only one way, i.e., 902500 + 3364 = 950^2 + 58^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 905864.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 905864.

It is an unprimeable number.

905864 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56609 + ... + 56624.

2⁹⁰⁵⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

905864 is a deficient number, since it is larger than the sum of its proper divisors (792646).

905864 is a wasteful number, since it uses less digits than its factorization.

905864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113239 (or 113235 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 905864 is about 951.7688795080. The cubic root of 905864 is about 96.7581746771.

The spelling of 905864 in words is "nine hundred five thousand, eight hundred sixty-four".