399634 has 8 divisors (see below), whose sum is σ = 602928. Its totient is φ = 198660.

The previous prime is 399617. The next prime is 399643. The reversal of 399634 is 436993.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 399634.

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 in 3 ways as a sum of consecutive naturals, for example, 52 + ... + 895.

It is an arithmetic number, because the mean of its divisors is an integer number (75366).

2³⁹⁹⁶³⁴ is an apocalyptic number.

399634 is a deficient number, since it is larger than the sum of its proper divisors (203294).

399634 is a wasteful number, since it uses less digits than its factorization.

399634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160.

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

The square root of 399634 is about 632.1661174090. The cubic root of 399634 is about 73.6581505230.

The spelling of 399634 in words is "three hundred ninety-nine thousand, six hundred thirty-four".