398034964978 has 32 divisors (see below), whose sum is σ = 688505097600. Its totient is φ = 169052292864.

The previous prime is 398034964909. The next prime is 398034964979. The reversal of 398034964978 is 879469430893.

It is not an unprimeable number, because it can be changed into a prime (398034964979) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 594138 + ... + 1071946.

It is an arithmetic number, because the mean of its divisors is an integer number (21515784300).

Almost surely, 2^398034964978 is an apocalyptic number.

398034964978 is a deficient number, since it is larger than the sum of its proper divisors (290470132622).

398034964978 is a wasteful number, since it uses less digits than its factorization.

398034964978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478354.

The product of its (nonzero) digits is 282175488, while the sum is 70.

The spelling of 398034964978 in words is "three hundred ninety-eight billion, thirty-four million, nine hundred sixty-four thousand, nine hundred seventy-eight".