323139072 has 80 divisors (see below), whose sum is σ = 872087040. Its totient is φ = 106309632.

The previous prime is 323139067. The next prime is 323139101. The reversal of 323139072 is 270931323.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120013 + ... + 122675.

It is an arithmetic number, because the mean of its divisors is an integer number (10901088).

Almost surely, 2^323139072 is an apocalyptic number.

323139072 is a gapful number since it is divisible by the number (32) 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 323139072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (436043520).

323139072 is an abundant number, since it is smaller than the sum of its proper divisors (548947968).

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

323139072 is an equidigital number, since it uses as much as digits as its factorization.

323139072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2763 (or 2747 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 30.

The square root of 323139072 is about 17976.0694257671. The cubic root of 323139072 is about 686.2196623627.

The spelling of 323139072 in words is "three hundred twenty-three million, one hundred thirty-nine thousand, seventy-two".