398331916 has 6 divisors (see below), whose sum is σ = 697080860. Its totient is φ = 199165956.

The previous prime is 398331877. The next prime is 398331931. The reversal of 398331916 is 619133893.

It is a happy number.

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 as a sum of consecutive naturals, namely, 49791486 + ... + 49791493.

Almost surely, 2^398331916 is an apocalyptic number.

It is an amenable number.

398331916 is a deficient number, since it is larger than the sum of its proper divisors (298748944).

398331916 is a wasteful number, since it uses less digits than its factorization.

398331916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99582983 (or 99582981 counting only the distinct ones).

The product of its digits is 104976, while the sum is 43.

The square root of 398331916 is about 19958.2543324811. The cubic root of 398331916 is about 735.7806603605.

The spelling of 398331916 in words is "three hundred ninety-eight million, three hundred thirty-one thousand, nine hundred sixteen".