320712930 has 24 divisors (see below), whose sum is σ = 833853852. Its totient is φ = 85523424.

The previous prime is 320712907. The next prime is 320712941. The reversal of 320712930 is 39217023.

It can be written as a sum of positive squares in 2 ways, for example, as 316804401 + 3908529 = 17799^2 + 1977^2 .

It is a super-3 number, since 3×320712930³ (a number of 26 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 320712894 and 320712903.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1781649 + ... + 1781828.

Almost surely, 2^320712930 is an apocalyptic number.

320712930 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

320712930 is an abundant number, since it is smaller than the sum of its proper divisors (513140922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

320712930 is a wasteful number, since it uses less digits than its factorization.

320712930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3563490 (or 3563487 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 27.

The square root of 320712930 is about 17908.4597327632. The cubic root of 320712930 is about 684.4979573910.

Adding to 320712930 its reverse (39217023), we get a palindrome (359929953).

The spelling of 320712930 in words is "three hundred twenty million, seven hundred twelve thousand, nine hundred thirty".