399057 has 8 divisors (see below), whose sum is σ = 560160. Its totient is φ = 252000.

The previous prime is 399043. The next prime is 399059. The reversal of 399057 is 750993.

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

It is not a de Polignac number, because 399057 - 2¹⁰ = 398033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (399059) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3444 + ... + 3557.

It is an arithmetic number, because the mean of its divisors is an integer number (70020).

2³⁹⁹⁰⁵⁷ is an apocalyptic number.

It is an amenable number.

399057 is a deficient number, since it is larger than the sum of its proper divisors (161103).

399057 is a wasteful number, since it uses less digits than its factorization.

399057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7023.

The product of its (nonzero) digits is 8505, while the sum is 33.

The square root of 399057 is about 631.7095851734. The cubic root of 399057 is about 73.6226837178.

The spelling of 399057 in words is "three hundred ninety-nine thousand, fifty-seven".