320890612 has 18 divisors (see below), whose sum is σ = 653242002. Its totient is φ = 137524464.

The previous prime is 320890571. The next prime is 320890613. The reversal of 320890612 is 216098023.

It can be written as a sum of positive squares in only one way, i.e., 304293136 + 16597476 = 17444^2 + 4074^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (320890613) 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 5 ways as a sum of consecutive naturals, for example, 818403 + ... + 818794.

Almost surely, 2^320890612 is an apocalyptic number.

It is an amenable number.

320890612 is an abundant number, since it is smaller than the sum of its proper divisors (332351390).

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

320890612 is a wasteful number, since it uses less digits than its factorization.

320890612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1637215 (or 1637206 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 320890612 is about 17913.4198856611. The cubic root of 320890612 is about 684.6243430161.

The spelling of 320890612 in words is "three hundred twenty million, eight hundred ninety thousand, six hundred twelve".