320088639 has 16 divisors (see below), whose sum is σ = 460282592. Its totient is φ = 196691328.

The previous prime is 320088623. The next prime is 320088647. The reversal of 320088639 is 936880023.

It is not a de Polignac number, because 320088639 - 2⁴ = 320088623 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 320088597 and 320088606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320088679) 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, 22989 + ... + 34185.

It is an arithmetic number, because the mean of its divisors is an integer number (28767662).

Almost surely, 2^320088639 is an apocalyptic number.

320088639 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

320088639 is a deficient number, since it is larger than the sum of its proper divisors (140193953).

320088639 is a wasteful number, since it uses less digits than its factorization.

320088639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11946.

The product of its (nonzero) digits is 62208, while the sum is 39.

The square root of 320088639 is about 17891.0211838229. The cubic root of 320088639 is about 684.0535272395.

The spelling of 320088639 in words is "three hundred twenty million, eighty-eight thousand, six hundred thirty-nine".