813655828 has 12 divisors (see below), whose sum is σ = 1426976320. Its totient is φ = 405948312.

The previous prime is 813655807. The next prime is 813655831. The reversal of 813655828 is 828556318.

It is a hoax number, since the sum of its digits (46) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 217818 + ... + 221521.

Almost surely, 2^813655828 is an apocalyptic number.

It is an amenable number.

813655828 is a deficient number, since it is larger than the sum of its proper divisors (613320492).

813655828 is a wasteful number, since it uses less digits than its factorization.

813655828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439806 (or 439804 counting only the distinct ones).

The product of its digits is 460800, while the sum is 46.

The square root of 813655828 is about 28524.6529864957. The cubic root of 813655828 is about 933.5700555444.

The spelling of 813655828 in words is "eight hundred thirteen million, six hundred fifty-five thousand, eight hundred twenty-eight".