320003872 has 12 divisors (see below), whose sum is σ = 630007686. Its totient is φ = 160001920.

The previous prime is 320003867. The next prime is 320003911. The reversal of 320003872 is 278300023.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 277022736 + 42981136 = 16644^2 + 6556^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5000029 + ... + 5000092.

Almost surely, 2^320003872 is an apocalyptic number.

320003872 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

320003872 is a deficient number, since it is larger than the sum of its proper divisors (310003814).

320003872 is a wasteful number, since it uses less digits than its factorization.

320003872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10000131 (or 10000123 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 25.

The square root of 320003872 is about 17888.6520453610. The cubic root of 320003872 is about 683.9931374207.

Adding to 320003872 its reverse (278300023), we get a palindrome (598303895).

The spelling of 320003872 in words is "three hundred twenty million, three thousand, eight hundred seventy-two".