399768932 has 12 divisors (see below), whose sum is σ = 722163456. Its totient is φ = 193436520.

The previous prime is 399768917. The next prime is 399768947. The reversal of 399768932 is 239867993.

It is an interprime number because it is at equal distance from previous prime (399768917) and next prime (399768947).

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 3 ways as a sum of consecutive naturals, for example, 1611848 + ... + 1612095.

It is an arithmetic number, because the mean of its divisors is an integer number (60180288).

Almost surely, 2^399768932 is an apocalyptic number.

It is an amenable number.

399768932 is a deficient number, since it is larger than the sum of its proper divisors (322394524).

399768932 is a wasteful number, since it uses less digits than its factorization.

399768932 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3223978 (or 3223976 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 56.

The square root of 399768932 is about 19994.2224655024. Note that the first 3 decimals coincide. The cubic root of 399768932 is about 736.6643954349.

The spelling of 399768932 in words is "three hundred ninety-nine million, seven hundred sixty-eight thousand, nine hundred thirty-two".