320412865 has 16 divisors (see below), whose sum is σ = 413349120. Its totient is φ = 237669120.

The previous prime is 320412863. The next prime is 320412899. The reversal of 320412865 is 568214023.

It is not a de Polignac number, because 320412865 - 2¹ = 320412863 is a prime.

It is not an unprimeable number, because it can be changed into a prime (320412863) 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, 31416 + ... + 40345.

It is an arithmetic number, because the mean of its divisors is an integer number (25834320).

Almost surely, 2^320412865 is an apocalyptic number.

It is an amenable number.

320412865 is a deficient number, since it is larger than the sum of its proper divisors (92936255).

320412865 is a wasteful number, since it uses less digits than its factorization.

320412865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71832.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 320412865 is about 17900.0800277541. The cubic root of 320412865 is about 684.2844144263.

Adding to 320412865 its reverse (568214023), we get a palindrome (888626888).

The spelling of 320412865 in words is "three hundred twenty million, four hundred twelve thousand, eight hundred sixty-five".