320864291 has 24 divisors (see below), whose sum is σ = 367769472. Its totient is φ = 279417600.

The previous prime is 320864251. The next prime is 320864303. The reversal of 320864291 is 192468023.

It is not a de Polignac number, because 320864291 - 2⁶ = 320864227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320864251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 423485 + ... + 424241.

It is an arithmetic number, because the mean of its divisors is an integer number (15323728).

Almost surely, 2^320864291 is an apocalyptic number.

320864291 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

320864291 is a deficient number, since it is larger than the sum of its proper divisors (46905181).

320864291 is a wasteful number, since it uses less digits than its factorization.

320864291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 923 (or 912 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 320864291 is about 17912.6851979261. The cubic root of 320864291 is about 684.6056237710.

The spelling of 320864291 in words is "three hundred twenty million, eight hundred sixty-four thousand, two hundred ninety-one".