398520025894 has 16 divisors (see below), whose sum is σ = 602476580160. Its totient is φ = 197696385000.

The previous prime is 398520025879. The next prime is 398520025913. The reversal of 398520025894 is 498520025893.

It is a super-2 number, since 2×398520025894² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 47232 + ... + 894019.

It is an arithmetic number, because the mean of its divisors is an integer number (37654786260).

Almost surely, 2^398520025894 is an apocalyptic number.

398520025894 is a deficient number, since it is larger than the sum of its proper divisors (203956554266).

398520025894 is a wasteful number, since it uses less digits than its factorization.

398520025894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 942915.

The product of its (nonzero) digits is 6220800, while the sum is 55.

Subtracting 398520025894 from its reverse (498520025893), we obtain a palindrome (99999999999).

The spelling of 398520025894 in words is "three hundred ninety-eight billion, five hundred twenty million, twenty-five thousand, eight hundred ninety-four".