320774240 has 24 divisors (see below), whose sum is σ = 757829520. Its totient is φ = 128309632.

The previous prime is 320774231. The next prime is 320774273. The reversal of 320774240 is 42477023.

It is a super-2 number, since 2×320774240² = 205792226095155200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1002260 + ... + 1002579.

It is an arithmetic number, because the mean of its divisors is an integer number (31576230).

Almost surely, 2^320774240 is an apocalyptic number.

It is an amenable number.

320774240 is an abundant number, since it is smaller than the sum of its proper divisors (437055280).

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

320774240 is a wasteful number, since it uses less digits than its factorization.

320774240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004854 (or 2004846 counting only the distinct ones).

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 320774240 is about 17910.1714117984. The cubic root of 320774240 is about 684.5415726119.

The spelling of 320774240 in words is "three hundred twenty million, seven hundred seventy-four thousand, two hundred forty".