399552 has 28 divisors (see below), whose sum is σ = 1057656. Its totient is φ = 133120.

The previous prime is 399541. The next prime is 399557. The reversal of 399552 is 255993.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (399557) by changing a digit.

399552 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 3 ways as a sum of consecutive naturals, for example, 849 + ... + 1232.

2³⁹⁹⁵⁵² is an apocalyptic number.

399552 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

399552 is an abundant number, since it is smaller than the sum of its proper divisors (658104).

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

399552 is a wasteful number, since it uses less digits than its factorization.

399552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2096 (or 2086 counting only the distinct ones).

The product of its digits is 12150, while the sum is 33.

The square root of 399552 is about 632.1012577111. The cubic root of 399552 is about 73.6531122618.

It can be divided in two parts, 39 and 9552, that added together give a triangular number (9591 = T₁₃₈).

The spelling of 399552 in words is "three hundred ninety-nine thousand, five hundred fifty-two".