398756674 has 8 divisors (see below), whose sum is σ = 598252608. Its totient is φ = 199339140.

The previous prime is 398756669. The next prime is 398756707. The reversal of 398756674 is 476657893.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

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, 4582 + ... + 28609.

It is an arithmetic number, because the mean of its divisors is an integer number (74781576).

Almost surely, 2^398756674 is an apocalyptic number.

398756674 is a deficient number, since it is larger than the sum of its proper divisors (199495934).

398756674 is a wasteful number, since it uses less digits than its factorization.

398756674 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39200.

The product of its digits is 7620480, while the sum is 55.

The square root of 398756674 is about 19968.8926583324. The cubic root of 398756674 is about 736.0420986966.

The spelling of 398756674 in words is "three hundred ninety-eight million, seven hundred fifty-six thousand, six hundred seventy-four".