398940109772 has 24 divisors (see below), whose sum is σ = 729218651616. Its totient is φ = 190609050368.

The previous prime is 398940109717. The next prime is 398940109781. The reversal of 398940109772 is 277901049893.

It is a super-2 number, since 2×398940109772² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2047133 + ... + 2233524.

It is an arithmetic number, because the mean of its divisors is an integer number (30384110484).

Almost surely, 2^398940109772 is an apocalyptic number.

It is an amenable number.

398940109772 is a deficient number, since it is larger than the sum of its proper divisors (330278541844).

398940109772 is a wasteful number, since it uses less digits than its factorization.

398940109772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4281697 (or 4281695 counting only the distinct ones).

The product of its (nonzero) digits is 6858432, while the sum is 59.

The spelling of 398940109772 in words is "three hundred ninety-eight billion, nine hundred forty million, one hundred nine thousand, seven hundred seventy-two".