399154172 has 6 divisors (see below), whose sum is σ = 698519808. Its totient is φ = 199577084.

The previous prime is 399154159. The next prime is 399154219. The reversal of 399154172 is 271451993.

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 as a sum of consecutive naturals, namely, 49894268 + ... + 49894275.

It is an arithmetic number, because the mean of its divisors is an integer number (116419968).

Almost surely, 2^399154172 is an apocalyptic number.

It is an amenable number.

399154172 is a deficient number, since it is larger than the sum of its proper divisors (299365636).

399154172 is a wasteful number, since it uses less digits than its factorization.

399154172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99788547 (or 99788545 counting only the distinct ones).

The product of its digits is 68040, while the sum is 41.

The square root of 399154172 is about 19978.8431096498. The cubic root of 399154172 is about 736.2865904028.

The spelling of 399154172 in words is "three hundred ninety-nine million, one hundred fifty-four thousand, one hundred seventy-two".