399354668 has 12 divisors (see below), whose sum is σ = 699351072. Its totient is φ = 199540080.

The previous prime is 399354661. The next prime is 399354689. The reversal of 399354668 is 866453993.

It is not an unprimeable number, because it can be changed into a prime (399354661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27623 + ... + 39518.

It is an arithmetic number, because the mean of its divisors is an integer number (58279256).

Almost surely, 2^399354668 is an apocalyptic number.

It is an amenable number.

399354668 is a deficient number, since it is larger than the sum of its proper divisors (299996404).

399354668 is a wasteful number, since it uses less digits than its factorization.

399354668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68632 (or 68630 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 53.

The square root of 399354668 is about 19983.8601876614. The cubic root of 399354668 is about 736.4098492139.

The spelling of 399354668 in words is "three hundred ninety-nine million, three hundred fifty-four thousand, six hundred sixty-eight".