813036 has 24 divisors (see below), whose sum is σ = 2168320. Its totient is φ = 232272.

The previous prime is 813023. The next prime is 813041. The reversal of 813036 is 630318.

It is a super-2 number, since 2×813036² = 1322055074592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 813036.

It is an unprimeable number.

813036 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 in 7 ways as a sum of consecutive naturals, for example, 4756 + ... + 4923.

2⁸¹³⁰³⁶ is an apocalyptic number.

It is an amenable number.

813036 is an abundant number, since it is smaller than the sum of its proper divisors (1355284).

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

813036 is a wasteful number, since it uses less digits than its factorization.

813036 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9693 (or 9691 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 813036 is about 901.6850891525. The cubic root of 813036 is about 93.3332936508. Note that the first 3 decimals are identical.

The spelling of 813036 in words is "eight hundred thirteen thousand, thirty-six".