399024844 has 12 divisors (see below), whose sum is σ = 700138600. Its totient is φ = 198985248.

The previous prime is 399024797. The next prime is 399024859. The reversal of 399024844 is 448420993.

It is a super-2 number, since 2×399024844² = 318441652258448672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 399024844.

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, 130089 + ... + 133120.

Almost surely, 2^399024844 is an apocalyptic number.

It is an amenable number.

399024844 is a deficient number, since it is larger than the sum of its proper divisors (301113756).

399024844 is a wasteful number, since it uses less digits than its factorization.

399024844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263592 (or 263590 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 43.

The square root of 399024844 is about 19975.6062235918. The cubic root of 399024844 is about 736.2070616017.

The spelling of 399024844 in words is "three hundred ninety-nine million, twenty-four thousand, eight hundred forty-four".