398967418 has 8 divisors (see below), whose sum is σ = 599401440. Its totient is φ = 199166940.

The previous prime is 398967409. The next prime is 398967449. The reversal of 398967418 is 814769893.

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 (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 156808 + ... + 159331.

It is an arithmetic number, because the mean of its divisors is an integer number (74925180).

Almost surely, 2^398967418 is an apocalyptic number.

398967418 is a deficient number, since it is larger than the sum of its proper divisors (200434022).

398967418 is a wasteful number, since it uses less digits than its factorization.

398967418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316772.

The product of its digits is 2612736, while the sum is 55.

The square root of 398967418 is about 19974.1687686872. The cubic root of 398967418 is about 736.1717426187.

The spelling of 398967418 in words is "three hundred ninety-eight million, nine hundred sixty-seven thousand, four hundred eighteen".