320439892 has 6 divisors (see below), whose sum is σ = 560769818. Its totient is φ = 160219944.

The previous prime is 320439859. The next prime is 320439941. The reversal of 320439892 is 298934023.

It can be written as a sum of positive squares in only one way, i.e., 227587396 + 92852496 = 15086^2 + 9636^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40054983 + ... + 40054990.

Almost surely, 2^320439892 is an apocalyptic number.

It is an amenable number.

320439892 is a deficient number, since it is larger than the sum of its proper divisors (240329926).

320439892 is a wasteful number, since it uses less digits than its factorization.

320439892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80109977 (or 80109975 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 320439892 is about 17900.8349525937. The cubic root of 320439892 is about 684.3036538066.

The spelling of 320439892 in words is "three hundred twenty million, four hundred thirty-nine thousand, eight hundred ninety-two".