320699904 has 120 divisors (see below), whose sum is σ = 994085928. Its totient is φ = 91607040.

The previous prime is 320699903. The next prime is 320699923. The reversal of 320699904 is 409996023.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320699903) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73134 + ... + 77394.

Almost surely, 2^320699904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 320699904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (497042964).

320699904 is an abundant number, since it is smaller than the sum of its proper divisors (673386024).

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

320699904 is an equidigital number, since it uses as much as digits as its factorization.

320699904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4296 (or 4273 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 320699904 is about 17908.0960462021. The cubic root of 320699904 is about 684.4886901302.

The spelling of 320699904 in words is "three hundred twenty million, six hundred ninety-nine thousand, nine hundred four".