813580398 has 12 divisors (see below), whose sum is σ = 1762757568. Its totient is φ = 271193460.

The previous prime is 813580307. The next prime is 813580423. The reversal of 813580398 is 893085318.

It is a congruent number.

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, 22599438 + ... + 22599473.

It is an arithmetic number, because the mean of its divisors is an integer number (146896464).

Almost surely, 2^813580398 is an apocalyptic number.

813580398 is an abundant number, since it is smaller than the sum of its proper divisors (949177170).

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

813580398 is a wasteful number, since it uses less digits than its factorization.

813580398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45198919 (or 45198916 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 813580398 is about 28523.3307662342. The cubic root of 813580398 is about 933.5412057683.

The spelling of 813580398 in words is "eight hundred thirteen million, five hundred eighty thousand, three hundred ninety-eight".