399541928 has 16 divisors (see below), whose sum is σ = 750518880. Its totient is φ = 199403568.

The previous prime is 399541927. The next prime is 399541949. The reversal of 399541928 is 829145993.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (399541927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41276 + ... + 50027.

It is an arithmetic number, because the mean of its divisors is an integer number (46907430).

Almost surely, 2^399541928 is an apocalyptic number.

It is an amenable number.

399541928 is a deficient number, since it is larger than the sum of its proper divisors (350976952).

399541928 is a wasteful number, since it uses less digits than its factorization.

399541928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91856 (or 91852 counting only the distinct ones).

The product of its digits is 699840, while the sum is 50.

The square root of 399541928 is about 19988.5449195283. The cubic root of 399541928 is about 736.5249336830.

The spelling of 399541928 in words is "three hundred ninety-nine million, five hundred forty-one thousand, nine hundred twenty-eight".