399803239 has 12 divisors (see below), whose sum is σ = 442930432. Its totient is φ = 360581760.

The previous prime is 399803237. The next prime is 399803269. The reversal of 399803239 is 932308993.

It is a happy number.

It is not a de Polignac number, because 399803239 - 2¹ = 399803237 is a prime.

It is a super-2 number, since 2×399803239² = 319685259829782242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399803231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2359 + ... + 28375.

Almost surely, 2^399803239 is an apocalyptic number.

399803239 is a deficient number, since it is larger than the sum of its proper divisors (43127193).

399803239 is a wasteful number, since it uses less digits than its factorization.

399803239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26166 (or 26155 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 46.

The square root of 399803239 is about 19995.0803699310. The cubic root of 399803239 is about 736.6854676264.

The spelling of 399803239 in words is "three hundred ninety-nine million, eight hundred three thousand, two hundred thirty-nine".