399436 has 6 divisors (see below), whose sum is σ = 699020. Its totient is φ = 199716.

The previous prime is 399433. The next prime is 399439. The reversal of 399436 is 634993.

It is an interprime number because it is at equal distance from previous prime (399433) and next prime (399439).

It is not an unprimeable number, because it can be changed into a prime (399433) by changing a digit.

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, 49926 + ... + 49933.

2³⁹⁹⁴³⁶ is an apocalyptic number.

It is an amenable number.

399436 is a deficient number, since it is larger than the sum of its proper divisors (299584).

399436 is a wasteful number, since it uses less digits than its factorization.

399436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99863 (or 99861 counting only the distinct ones).

The product of its digits is 17496, while the sum is 34.

The square root of 399436 is about 632.0094935996. The cubic root of 399436 is about 73.6459837879.

The spelling of 399436 in words is "three hundred ninety-nine thousand, four hundred thirty-six".