399874 has 16 divisors (see below), whose sum is σ = 669600. Its totient is φ = 177984.

The previous prime is 399871. The next prime is 399887. The reversal of 399874 is 478993.

It is not an unprimeable number, because it can be changed into a prime (399871) 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, 337 + ... + 955.

It is an arithmetic number, because the mean of its divisors is an integer number (41850).

2³⁹⁹⁸⁷⁴ is an apocalyptic number.

399874 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

399874 is a deficient number, since it is larger than the sum of its proper divisors (269726).

399874 is a wasteful number, since it uses less digits than its factorization.

399874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657.

The product of its digits is 54432, while the sum is 40.

The square root of 399874 is about 632.3559124417. The cubic root of 399874 is about 73.6728926942.

The spelling of 399874 in words is "three hundred ninety-nine thousand, eight hundred seventy-four".