320029989 has 16 divisors (see below), whose sum is σ = 438316032. Its totient is φ = 207625968.

The previous prime is 320029937. The next prime is 320029991. The reversal of 320029989 is 989920023.

It is not a de Polignac number, because 320029989 - 2⁷ = 320029861 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 320029989.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320129989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7092 + ... + 26274.

It is an arithmetic number, because the mean of its divisors is an integer number (27394752).

Almost surely, 2^320029989 is an apocalyptic number.

It is an amenable number.

320029989 is a deficient number, since it is larger than the sum of its proper divisors (118286043).

320029989 is a wasteful number, since it uses less digits than its factorization.

320029989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19336.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 320029989 is about 17889.3820183929. The cubic root of 320029989 is about 684.0117448652.

The spelling of 320029989 in words is "three hundred twenty million, twenty-nine thousand, nine hundred eighty-nine".