399136 has 12 divisors (see below), whose sum is σ = 785862. Its totient is φ = 199552.

The previous prime is 399131. The next prime is 399137. The reversal of 399136 is 631993.

399136 is nontrivially palindromic in base 14.

It can be written as a sum of positive squares in only one way, i.e., 309136 + 90000 = 556^2 + 300^2 .

It is a junction number, because it is equal to n+sod(n) for n = 399098 and 399107.

It is not an unprimeable number, because it can be changed into a prime (399131) by changing a digit.

399136 is an untouchable number, because it is not equal to the sum of proper divisors of any 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, 6205 + ... + 6268.

2³⁹⁹¹³⁶ is an apocalyptic number.

It is an amenable number.

399136 is a deficient number, since it is larger than the sum of its proper divisors (386726).

399136 is a wasteful number, since it uses less digits than its factorization.

399136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12483 (or 12475 counting only the distinct ones).

The product of its digits is 4374, while the sum is 31.

The square root of 399136 is about 631.7721108121. The cubic root of 399136 is about 73.6275416773.

It can be divided in two parts, 399 and 136, that added together give a palindrome (535).

The spelling of 399136 in words is "three hundred ninety-nine thousand, one hundred thirty-six".