320737872 has 160 divisors (see below), whose sum is σ = 1031656192. Its totient is φ = 83607552.

The previous prime is 320737853. The next prime is 320737897. The reversal of 320737872 is 278737023.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 320737872.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 423318 + ... + 424074.

Almost surely, 2^320737872 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 320737872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (515828096).

320737872 is an abundant number, since it is smaller than the sum of its proper divisors (710918320).

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

320737872 is a wasteful number, since it uses less digits than its factorization.

320737872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 885 (or 879 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 39.

The square root of 320737872 is about 17909.1560940207. The cubic root of 320737872 is about 684.5157015103.

The spelling of 320737872 in words is "three hundred twenty million, seven hundred thirty-seven thousand, eight hundred seventy-two".