398617975044 has 27 divisors (see below), whose sum is σ = 1007627234887. Its totient is φ = 132871395624.

The previous prime is 398617975039. The next prime is 398617975073. The reversal of 398617975044 is 440579716893.

The square root of 398617975044 is 631362.

It is a perfect power (a square), and thus also a powerful number.

398617975044 is a `hidden beast` number, since 3 + 9 + 8 + 617 + 9 + 7 + 5 + 0 + 4 + 4 = 666.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3735559 + ... + 3840785.

Almost surely, 2^398617975044 is an apocalyptic number.

398617975044 is the 631362-nd square number.

It is an amenable number.

398617975044 is an abundant number, since it is smaller than the sum of its proper divisors (609009259843).

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

398617975044 is an frugal number, since it uses more digits than its factorization.

398617975044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210464 (or 105232 counting only the distinct ones).

The product of its (nonzero) digits is 45722880, while the sum is 63.

The spelling of 398617975044 in words is "three hundred ninety-eight billion, six hundred seventeen million, nine hundred seventy-five thousand, forty-four".