398601275522 has 18 divisors (see below), whose sum is σ = 617854141737. Its totient is φ = 192858192000.

The previous prime is 398601275521. The next prime is 398601275531. The reversal of 398601275522 is 225572106893.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 205942608481 + 192658667041 = 453809^2 + 438929^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=446431.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (398601275521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 27671522 + ... + 27685922.

Almost surely, 2^398601275522 is an apocalyptic number.

398601275522 is a deficient number, since it is larger than the sum of its proper divisors (219252866215).

398601275522 is an frugal number, since it uses more digits than its factorization.

398601275522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28866 (or 14434 counting only the distinct ones).

The product of its (nonzero) digits is 1814400, while the sum is 50.

Multiplying 398601275522 by its sum of digits (50), we get a square (19930063776100 = 4464310²).

The spelling of 398601275522 in words is "three hundred ninety-eight billion, six hundred one million, two hundred seventy-five thousand, five hundred twenty-two".