398818568 has 8 divisors (see below), whose sum is σ = 747784830. Its totient is φ = 199409280.

The previous prime is 398818561. The next prime is 398818571. The reversal of 398818568 is 865818893.

It can be written as a sum of positive squares in only one way, i.e., 308986084 + 89832484 = 17578^2 + 9478^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (398818561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24926153 + ... + 24926168.

Almost surely, 2^398818568 is an apocalyptic number.

It is an amenable number.

398818568 is a deficient number, since it is larger than the sum of its proper divisors (348966262).

398818568 is a wasteful number, since it uses less digits than its factorization.

398818568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49852327 (or 49852323 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 56.

The square root of 398818568 is about 19970.4423586459. The cubic root of 398818568 is about 736.0801789226.

The spelling of 398818568 in words is "three hundred ninety-eight million, eight hundred eighteen thousand, five hundred sixty-eight".