398624866 has 8 divisors (see below), whose sum is σ = 598320720. Its totient is φ = 199184628.

The previous prime is 398624861. The next prime is 398624869. The reversal of 398624866 is 668426893.

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

It is not an unprimeable number, because it can be changed into a prime (398624861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59956 + ... + 66271.

It is an arithmetic number, because the mean of its divisors is an integer number (74790090).

Almost surely, 2^398624866 is an apocalyptic number.

398624866 is a deficient number, since it is larger than the sum of its proper divisors (199695854).

398624866 is a wasteful number, since it uses less digits than its factorization.

398624866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127808.

The product of its digits is 2985984, while the sum is 52.

The square root of 398624866 is about 19965.5920523284. The cubic root of 398624866 is about 735.9609908141.

The spelling of 398624866 in words is "three hundred ninety-eight million, six hundred twenty-four thousand, eight hundred sixty-six".