320886457 has 4 divisors (see below), whose sum is σ = 321269760. Its totient is φ = 320503156.

The previous prime is 320886431. The next prime is 320886499. The reversal of 320886457 is 754688023.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 320886457 - 2⁷ = 320886329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (320884457) 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 3 ways as a sum of consecutive naturals, for example, 190393 + ... + 192070.

It is an arithmetic number, because the mean of its divisors is an integer number (80317440).

Almost surely, 2^320886457 is an apocalyptic number.

It is an amenable number.

320886457 is a deficient number, since it is larger than the sum of its proper divisors (383303).

320886457 is an equidigital number, since it uses as much as digits as its factorization.

320886457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383302.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 320886457 is about 17913.3039107809. The cubic root of 320886457 is about 684.6213880876.

The spelling of 320886457 in words is "three hundred twenty million, eight hundred eighty-six thousand, four hundred fifty-seven".