399455458 has 4 divisors (see below), whose sum is σ = 599183190. Its totient is φ = 199727728.

The previous prime is 399455447. The next prime is 399455471. The reversal of 399455458 is 854554993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 316590849 + 82864609 = 17793^2 + 9103^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 99863863 + ... + 99863866.

Almost surely, 2^399455458 is an apocalyptic number.

399455458 is a deficient number, since it is larger than the sum of its proper divisors (199727732).

399455458 is a wasteful number, since it uses less digits than its factorization.

399455458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199727731.

The product of its digits is 3888000, while the sum is 52.

The square root of 399455458 is about 19986.3818136250. The cubic root of 399455458 is about 736.4717962427.

The spelling of 399455458 in words is "three hundred ninety-nine million, four hundred fifty-five thousand, four hundred fifty-eight".