813536 has 12 divisors (see below), whose sum is σ = 1601712. Its totient is φ = 406752.

The previous prime is 813529. The next prime is 813541. The reversal of 813536 is 635318.

It is a Smith number, since the sum of its digits (26) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

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 813536.

It is an unprimeable number.

813536 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, 12680 + ... + 12743.

It is an arithmetic number, because the mean of its divisors is an integer number (133476).

2⁸¹³⁵³⁶ is an apocalyptic number.

It is an amenable number.

813536 is a deficient number, since it is larger than the sum of its proper divisors (788176).

813536 is a wasteful number, since it uses less digits than its factorization.

813536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25433 (or 25425 counting only the distinct ones).

The product of its digits is 2160, while the sum is 26.

The square root of 813536 is about 901.9623051991. The cubic root of 813536 is about 93.3524223994.

The spelling of 813536 in words is "eight hundred thirteen thousand, five hundred thirty-six".