981157912 has 16 divisors (see below), whose sum is σ = 2102481360. Its totient is φ = 420496224.

The previous prime is 981157901. The next prime is 981157949. The reversal of 981157912 is 219751189.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8760283 + ... + 8760394.

It is an arithmetic number, because the mean of its divisors is an integer number (131405085).

Almost surely, 2^981157912 is an apocalyptic number.

It is an amenable number.

981157912 is an abundant number, since it is smaller than the sum of its proper divisors (1121323448).

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

981157912 is a wasteful number, since it uses less digits than its factorization.

981157912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17520690 (or 17520686 counting only the distinct ones).

The product of its digits is 45360, while the sum is 43.

The square root of 981157912 is about 31323.4402963659. The cubic root of 981157912 is about 993.6794386722.

The spelling of 981157912 in words is "nine hundred eighty-one million, one hundred fifty-seven thousand, nine hundred twelve".