320031380 has 24 divisors (see below), whose sum is σ = 672645120. Its totient is φ = 127902240.

The previous prime is 320031373. The next prime is 320031401. The reversal of 320031380 is 83130023.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 19325 + ... + 31835.

It is an arithmetic number, because the mean of its divisors is an integer number (28026880).

Almost surely, 2^320031380 is an apocalyptic number.

It is an amenable number.

320031380 is an abundant number, since it is smaller than the sum of its proper divisors (352613740).

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

320031380 is a wasteful number, since it uses less digits than its factorization.

320031380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13799 (or 13797 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 320031380 is about 17889.4208961609. The cubic root of 320031380 is about 684.0127358754.

The spelling of 320031380 in words is "three hundred twenty million, thirty-one thousand, three hundred eighty".