813438 has 12 divisors (see below), whose sum is σ = 1762488. Its totient is φ = 271140.

The previous prime is 813427. The next prime is 813443. The reversal of 813438 is 834318.

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 813438.

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, 22578 + ... + 22613.

It is an arithmetic number, because the mean of its divisors is an integer number (146874).

2⁸¹³⁴³⁸ is an apocalyptic number.

813438 is an abundant number, since it is smaller than the sum of its proper divisors (949050).

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

813438 is a wasteful number, since it uses less digits than its factorization.

813438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45199 (or 45196 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 813438 is about 901.9079775676. The cubic root of 813438 is about 93.3486737823.

The spelling of 813438 in words is "eight hundred thirteen thousand, four hundred thirty-eight".