320431020 has 96 divisors (see below), whose sum is σ = 1104273408. Its totient is φ = 67606272.

The previous prime is 320430899. The next prime is 320431021. The reversal of 320431020 is 20134023.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is not an unprimeable number, because it can be changed into a prime (320431021) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23884 + ... + 34803.

It is an arithmetic number, because the mean of its divisors is an integer number (11502848).

Almost surely, 2^320431020 is an apocalyptic number.

320431020 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

320431020 is an abundant number, since it is smaller than the sum of its proper divisors (783842388).

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

320431020 is a wasteful number, since it uses less digits than its factorization.

320431020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58719 (or 58717 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 320431020 is about 17900.5871412085. The cubic root of 320431020 is about 684.2973383236.

Adding to 320431020 its reverse (20134023), we get a palindrome (340565043).

The spelling of 320431020 in words is "three hundred twenty million, four hundred thirty-one thousand, twenty".