399930236 has 48 divisors (see below), whose sum is σ = 770811552. Its totient is φ = 180787200.

The previous prime is 399930217. The next prime is 399930241. The reversal of 399930236 is 632039993.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185726 + ... + 187866.

It is an arithmetic number, because the mean of its divisors is an integer number (16058574).

Almost surely, 2^399930236 is an apocalyptic number.

It is an amenable number.

399930236 is a deficient number, since it is larger than the sum of its proper divisors (370881316).

399930236 is a wasteful number, since it uses less digits than its factorization.

399930236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270 (or 2268 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 44.

The square root of 399930236 is about 19998.2558239462. The cubic root of 399930236 is about 736.7634617753.

The spelling of 399930236 in words is "three hundred ninety-nine million, nine hundred thirty thousand, two hundred thirty-six".