399736 has 16 divisors (see below), whose sum is σ = 775800. Its totient is φ = 192864.

The previous prime is 399731. The next prime is 399739. The reversal of 399736 is 637993.

It is a junction number, because it is equal to n+sod(n) for n = 399695 and 399704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 630 + ... + 1093.

2³⁹⁹⁷³⁶ is an apocalyptic number.

It is an amenable number.

399736 is a deficient number, since it is larger than the sum of its proper divisors (376064).

399736 is a wasteful number, since it uses less digits than its factorization.

399736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1758 (or 1754 counting only the distinct ones).

The product of its digits is 30618, while the sum is 37.

The square root of 399736 is about 632.2467872595. The cubic root of 399736 is about 73.6644166668.

The spelling of 399736 in words is "three hundred ninety-nine thousand, seven hundred thirty-six".