398266185512 has 48 divisors (see below), whose sum is σ = 809232236640. Its totient is φ = 183673708608.

The previous prime is 398266185497. The next prime is 398266185539. The reversal of 398266185512 is 215581662893.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1654373 + ... + 1879755.

It is an arithmetic number, because the mean of its divisors is an integer number (16859004930).

Almost surely, 2^398266185512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 398266185512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (404616118320).

398266185512 is an abundant number, since it is smaller than the sum of its proper divisors (410966051128).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

398266185512 is a wasteful number, since it uses less digits than its factorization.

398266185512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226722 (or 226705 counting only the distinct ones).

The product of its digits is 6220800, while the sum is 56.

The spelling of 398266185512 in words is "three hundred ninety-eight billion, two hundred sixty-six million, one hundred eighty-five thousand, five hundred twelve".