813538386 has 12 divisors (see below), whose sum is σ = 1762666542. Its totient is φ = 271179456.

The previous prime is 813538367. The next prime is 813538399. The reversal of 813538386 is 683835318.

813538386 is a `hidden beast` number, since 81 + 3 + 538 + 38 + 6 = 666.

813538386 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 only one way, i.e., 799136361 + 14402025 = 28269^2 + 3795^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22598271 + ... + 22598306.

Almost surely, 2^813538386 is an apocalyptic number.

813538386 is an abundant number, since it is smaller than the sum of its proper divisors (949128156).

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

813538386 is a wasteful number, since it uses less digits than its factorization.

813538386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45196585 (or 45196582 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 813538386 is about 28522.5943069700. The cubic root of 813538386 is about 933.5251366298.

The spelling of 813538386 in words is "eight hundred thirteen million, five hundred thirty-eight thousand, three hundred eighty-six".