399024 has 60 divisors (see below), whose sum is σ = 1189656. Its totient is φ = 124416.

The previous prime is 399023. The next prime is 399031. The reversal of 399024 is 420993.

It is not an unprimeable number, because it can be changed into a prime (399023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2367 + ... + 2529.

2³⁹⁹⁰²⁴ is an apocalyptic number.

399024 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (594828).

399024 is an abundant number, since it is smaller than the sum of its proper divisors (790632).

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

399024 is a wasteful number, since it uses less digits than its factorization.

399024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 399024 is about 631.6834650361. The cubic root of 399024 is about 73.6206542537.

The spelling of 399024 in words is "three hundred ninety-nine thousand, twenty-four".