399370252 has 24 divisors (see below), whose sum is σ = 754437600. Its totient is φ = 184415616.

The previous prime is 399370247. The next prime is 399370271. The reversal of 399370252 is 252073993.

It is a happy number.

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, 72177 + ... + 77512.

It is an arithmetic number, because the mean of its divisors is an integer number (31434900).

Almost surely, 2^399370252 is an apocalyptic number.

It is an amenable number.

399370252 is a deficient number, since it is larger than the sum of its proper divisors (355067348).

399370252 is a wasteful number, since it uses less digits than its factorization.

399370252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149745 (or 149743 counting only the distinct ones).

The product of its (nonzero) digits is 102060, while the sum is 40.

The square root of 399370252 is about 19984.2500985151. The cubic root of 399370252 is about 736.4194280526.

The spelling of 399370252 in words is "three hundred ninety-nine million, three hundred seventy thousand, two hundred fifty-two".