399474 has 12 divisors (see below), whose sum is σ = 865566. Its totient is φ = 133152.

The previous prime is 399473. The next prime is 399481. The reversal of 399474 is 474993.

It can be written as a sum of positive squares in only one way, i.e., 245025 + 154449 = 495^2 + 393^2 .

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 399474.

It is not an unprimeable number, because it can be changed into a prime (399473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 11079 + ... + 11114.

2³⁹⁹⁴⁷⁴ is an apocalyptic number.

399474 is an abundant number, since it is smaller than the sum of its proper divisors (466092).

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

399474 is a wasteful number, since it uses less digits than its factorization.

399474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22201 (or 22198 counting only the distinct ones).

The product of its digits is 27216, while the sum is 36.

The square root of 399474 is about 632.0395557242. The cubic root of 399474 is about 73.6483191296.

The spelling of 399474 in words is "three hundred ninety-nine thousand, four hundred seventy-four".