399536 has 10 divisors (see below), whose sum is σ = 774132. Its totient is φ = 199760.

The previous prime is 399527. The next prime is 399541. The reversal of 399536 is 635993.

It is a junction number, because it is equal to n+sod(n) for n = 399496 and 399505.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12470 + ... + 12501.

2³⁹⁹⁵³⁶ is an apocalyptic number.

It is an amenable number.

399536 is a deficient number, since it is larger than the sum of its proper divisors (374596).

399536 is a wasteful number, since it uses less digits than its factorization.

399536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24979 (or 24973 counting only the distinct ones).

The product of its digits is 21870, while the sum is 35.

The square root of 399536 is about 632.0886013843. The cubic root of 399536 is about 73.6521291060.

The spelling of 399536 in words is "three hundred ninety-nine thousand, five hundred thirty-six".