398826078388 has 48 divisors (see below), whose sum is σ = 715478400000. Its totient is φ = 194470518528.

The previous prime is 398826078383. The next prime is 398826078433. The reversal of 398826078388 is 883870628893.

It is a super-2 number, since 2×398826078388² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (398826078383) 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 15 ways as a sum of consecutive naturals, for example, 28482613 + ... + 28496611.

It is an arithmetic number, because the mean of its divisors is an integer number (14905800000).

Almost surely, 2^398826078388 is an apocalyptic number.

It is an amenable number.

398826078388 is a deficient number, since it is larger than the sum of its proper divisors (316652321612).

398826078388 is a wasteful number, since it uses less digits than its factorization.

398826078388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15184 (or 15182 counting only the distinct ones).

The product of its (nonzero) digits is 222953472, while the sum is 70.

The spelling of 398826078388 in words is "three hundred ninety-eight billion, eight hundred twenty-six million, seventy-eight thousand, three hundred eighty-eight".