399392 has 24 divisors (see below), whose sum is σ = 899136. Its totient is φ = 171072.

The previous prime is 399391. The next prime is 399401. The reversal of 399392 is 293993.

399392 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 399392.

It is not an unprimeable number, because it can be changed into a prime (399391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 668 + ... + 1115.

It is an arithmetic number, because the mean of its divisors is an integer number (37464).

2³⁹⁹³⁹² is an apocalyptic number.

399392 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

399392 is an abundant number, since it is smaller than the sum of its proper divisors (499744).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

399392 is a wasteful number, since it uses less digits than its factorization.

399392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1800 (or 1792 counting only the distinct ones).

The product of its digits is 13122, while the sum is 35.

The square root of 399392 is about 631.9746830372. The cubic root of 399392 is about 73.6432795230.

The spelling of 399392 in words is "three hundred ninety-nine thousand, three hundred ninety-two".