813830556 has 96 divisors (see below), whose sum is σ = 2422683648. Its totient is φ = 206458560.

The previous prime is 813830543. The next prime is 813830573. The reversal of 813830556 is 655038318.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29491 + ... + 49973.

It is an arithmetic number, because the mean of its divisors is an integer number (25236288).

Almost surely, 2^813830556 is an apocalyptic number.

813830556 is a gapful number since it is divisible by the number (86) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 813830556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1211341824).

813830556 is an abundant number, since it is smaller than the sum of its proper divisors (1608853092).

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

813830556 is a wasteful number, since it uses less digits than its factorization.

813830556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20551 (or 20549 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 813830556 is about 28527.7155762602. The cubic root of 813830556 is about 933.6368770628.

The spelling of 813830556 in words is "eight hundred thirteen million, eight hundred thirty thousand, five hundred fifty-six".