399532 has 24 divisors (see below), whose sum is σ = 842240. Its totient is φ = 162000.

The previous prime is 399527. The next prime is 399541. The reversal of 399532 is 235993.

399532 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 399494 and 399503.

It is an unprimeable number.

399532 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157 + ... + 907.

2³⁹⁹⁵³² is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 399532, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (421120).

399532 is an abundant number, since it is smaller than the sum of its proper divisors (442708).

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

399532 is a wasteful number, since it uses less digits than its factorization.

399532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781 (or 779 counting only the distinct ones).

The product of its digits is 7290, while the sum is 31.

The square root of 399532 is about 632.0854372630. The cubic root of 399532 is about 73.6518833130.

The spelling of 399532 in words is "three hundred ninety-nine thousand, five hundred thirty-two".