320989040 has 40 divisors (see below), whose sum is σ = 785582160. Its totient is φ = 121637376.

The previous prime is 320989037. The next prime is 320989049. The reversal of 320989040 is 40989023.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320989049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104069 + ... + 107108.

It is an arithmetic number, because the mean of its divisors is an integer number (19639554).

Almost surely, 2^320989040 is an apocalyptic number.

It is an amenable number.

320989040 is an abundant number, since it is smaller than the sum of its proper divisors (464593120).

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

320989040 is a wasteful number, since it uses less digits than its factorization.

320989040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211209 (or 211203 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 320989040 is about 17916.1670007845. The cubic root of 320989040 is about 684.6943350046.

The spelling of 320989040 in words is "three hundred twenty million, nine hundred eighty-nine thousand, forty".