320420312 has 16 divisors (see below), whose sum is σ = 610638000. Its totient is φ = 157583520.

The previous prime is 320420299. The next prime is 320420341. The reversal of 320420312 is 213024023.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 327812 + ... + 328787.

It is an arithmetic number, because the mean of its divisors is an integer number (38164875).

Almost surely, 2^320420312 is an apocalyptic number.

It is an amenable number.

320420312 is a deficient number, since it is larger than the sum of its proper divisors (290217688).

320420312 is a wasteful number, since it uses less digits than its factorization.

320420312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 656666 (or 656662 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 320420312 is about 17900.2880423752. The cubic root of 320420312 is about 684.2897157392.

Adding to 320420312 its reverse (213024023), we get a palindrome (533444335).

The spelling of 320420312 in words is "three hundred twenty million, four hundred twenty thousand, three hundred twelve".