981121320 has 48 divisors (see below), whose sum is σ = 3188645460. Its totient is φ = 261632256.

The previous prime is 981121313. The next prime is 981121367. The reversal of 981121320 is 23121189.

It can be written as a sum of positive squares in 2 ways, for example, as 947039076 + 34082244 = 30774^2 + 5838^2 .

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, 1362309 + ... + 1363028.

Almost surely, 2^981121320 is an apocalyptic number.

981121320 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

981121320 is an abundant number, since it is smaller than the sum of its proper divisors (2207524140).

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

981121320 is a wasteful number, since it uses less digits than its factorization.

981121320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2725354 (or 2725347 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 981121320 is about 31322.8561916055. The cubic root of 981121320 is about 993.6670855231.

The spelling of 981121320 in words is "nine hundred eighty-one million, one hundred twenty-one thousand, three hundred twenty".