320404456 has 16 divisors (see below), whose sum is σ = 610941600. Its totient is φ = 157486704.

The previous prime is 320404433. The next prime is 320404459. The reversal of 320404456 is 654404023.

It is not an unprimeable number, because it can be changed into a prime (320404459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338940 + ... + 339883.

It is an arithmetic number, because the mean of its divisors is an integer number (38183850).

Almost surely, 2^320404456 is an apocalyptic number.

It is an amenable number.

320404456 is a deficient number, since it is larger than the sum of its proper divisors (290537144).

320404456 is a wasteful number, since it uses less digits than its factorization.

320404456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678888 (or 678884 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 28.

The square root of 320404456 is about 17899.8451389949. The cubic root of 320404456 is about 684.2784281935.

Adding to 320404456 its reverse (654404023), we get a palindrome (974808479).

It can be divided in two parts, 3204044 and 56, that added together give a square (3204100 = 1790²).

The spelling of 320404456 in words is "three hundred twenty million, four hundred four thousand, four hundred fifty-six".