398351668 has 48 divisors (see below), whose sum is σ = 826370496. Its totient is φ = 165634560.

The previous prime is 398351623. The next prime is 398351669. The reversal of 398351668 is 866153893.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398351669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 61555 + ... + 67717.

It is an arithmetic number, because the mean of its divisors is an integer number (17216052).

Almost surely, 2^398351668 is an apocalyptic number.

It is an amenable number.

398351668 is an abundant number, since it is smaller than the sum of its proper divisors (428018828).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398351668 is a wasteful number, since it uses less digits than its factorization.

398351668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6304 (or 6302 counting only the distinct ones).

The product of its digits is 933120, while the sum is 49.

The square root of 398351668 is about 19958.7491592033. The cubic root of 398351668 is about 735.7928218259.

The spelling of 398351668 in words is "three hundred ninety-eight million, three hundred fifty-one thousand, six hundred sixty-eight".