320888889 has 24 divisors (see below), whose sum is σ = 492571872. Its totient is φ = 200603520.

The previous prime is 320888879. The next prime is 320888903. The reversal of 320888889 is 988888023.

It is not a de Polignac number, because 320888889 - 2⁷ = 320888761 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320888819) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 39594 + ... + 47004.

It is an arithmetic number, because the mean of its divisors is an integer number (20523828).

Almost surely, 2^320888889 is an apocalyptic number.

It is an amenable number.

320888889 is a deficient number, since it is larger than the sum of its proper divisors (171682983).

320888889 is a wasteful number, since it uses less digits than its factorization.

320888889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7717 (or 7714 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 54.

The square root of 320888889 is about 17913.3717931605. The cubic root of 320888889 is about 684.6231176662.

The spelling of 320888889 in words is "three hundred twenty million, eight hundred eighty-eight thousand, eight hundred eighty-nine".