399123252 has 36 divisors (see below), whose sum is σ = 1100613696. Its totient is φ = 120946320.

The previous prime is 399123239. The next prime is 399123269. The reversal of 399123252 is 252321993.

399123252 is a `hidden beast` number, since 399 + 12 + 3 + 252 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 503548 + ... + 504339.

Almost surely, 2^399123252 is an apocalyptic number.

It is an amenable number.

399123252 is an abundant number, since it is smaller than the sum of its proper divisors (701490444).

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

399123252 is a wasteful number, since it uses less digits than its factorization.

399123252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1007908 (or 1007903 counting only the distinct ones).

The product of its digits is 29160, while the sum is 36.

The square root of 399123252 is about 19978.0692760837. The cubic root of 399123252 is about 736.2675780588.

The spelling of 399123252 in words is "three hundred ninety-nine million, one hundred twenty-three thousand, two hundred fifty-two".