813534732 has 96 divisors (see below), whose sum is σ = 2160076800. Its totient is φ = 264715776.

The previous prime is 813534721. The next prime is 813534737. The reversal of 813534732 is 237435318.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (813534737) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 827113 + ... + 828095.

It is an arithmetic number, because the mean of its divisors is an integer number (22500800).

Almost surely, 2^813534732 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 813534732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1080038400).

813534732 is an abundant number, since it is smaller than the sum of its proper divisors (1346542068).

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

813534732 is a wasteful number, since it uses less digits than its factorization.

813534732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172 (or 1164 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 813534732 is about 28522.5302524162. The cubic root of 813534732 is about 933.5237389879.

The spelling of 813534732 in words is "eight hundred thirteen million, five hundred thirty-four thousand, seven hundred thirty-two".