399212 has 24 divisors (see below), whose sum is σ = 783552. Its totient is φ = 176400.

The previous prime is 399197. The next prime is 399221. The reversal of 399212 is 212993.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 399212.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1787 + ... + 1997.

It is an arithmetic number, because the mean of its divisors is an integer number (32648).

2³⁹⁹²¹² is an apocalyptic number.

It is an amenable number.

399212 is a deficient number, since it is larger than the sum of its proper divisors (384340).

399212 is a wasteful number, since it uses less digits than its factorization.

399212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269 (or 267 counting only the distinct ones).

The product of its digits is 972, while the sum is 26.

The square root of 399212 is about 631.8322562200. The cubic root of 399212 is about 73.6322145524.

It can be divided in two parts, 3992 and 12, that added together give a palindrome (4004).

The spelling of 399212 in words is "three hundred ninety-nine thousand, two hundred twelve".