398378668 has 12 divisors (see below), whose sum is σ = 697913272. Its totient is φ = 198974880.

The previous prime is 398378623. The next prime is 398378689. The reversal of 398378668 is 866873893.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49398 + ... + 56893.

Almost surely, 2^398378668 is an apocalyptic number.

It is an amenable number.

398378668 is a deficient number, since it is larger than the sum of its proper divisors (299534604).

398378668 is a wasteful number, since it uses less digits than its factorization.

398378668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107232 (or 107230 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 58.

The square root of 398378668 is about 19959.4255428356. The cubic root of 398378668 is about 735.8094452928.

The spelling of 398378668 in words is "three hundred ninety-eight million, three hundred seventy-eight thousand, six hundred sixty-eight".