813721832 has 48 divisors (see below), whose sum is σ = 1936185120. Its totient is φ = 317032800.

The previous prime is 813721823. The next prime is 813721849. The reversal of 813721832 is 238127318.

It is a zygodrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 813721792 and 813721801.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 90044 + ... + 98667.

It is an arithmetic number, because the mean of its divisors is an integer number (40337190).

Almost surely, 2^813721832 is an apocalyptic number.

It is an amenable number.

813721832 is an abundant number, since it is smaller than the sum of its proper divisors (1122463288).

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

813721832 is a wasteful number, since it uses less digits than its factorization.

813721832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188742 (or 188731 counting only the distinct ones).

The product of its digits is 16128, while the sum is 35.

The square root of 813721832 is about 28525.8099271519. The cubic root of 813721832 is about 933.5952986876.

The spelling of 813721832 in words is "eight hundred thirteen million, seven hundred twenty-one thousand, eight hundred thirty-two".