399064 has 16 divisors (see below), whose sum is σ = 758520. Its totient is φ = 196800.

The previous prime is 399059. The next prime is 399067. The reversal of 399064 is 460993.

399064 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399067) by changing a digit.

399064 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364 + ... + 964.

2³⁹⁹⁰⁶⁴ is an apocalyptic number.

It is an amenable number.

399064 is a deficient number, since it is larger than the sum of its proper divisors (359456).

399064 is a wasteful number, since it uses less digits than its factorization.

399064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 690 (or 686 counting only the distinct ones).

The product of its (nonzero) digits is 5832, while the sum is 31.

The square root of 399064 is about 631.7151256698. The cubic root of 399064 is about 73.6231141958.

The spelling of 399064 in words is "three hundred ninety-nine thousand, sixty-four".