981442872 has 128 divisors (see below), whose sum is σ = 2903040000. Its totient is φ = 306332928.

The previous prime is 981442849. The next prime is 981442873. The reversal of 981442872 is 278244189.

It is a super-2 number, since 2×981442872² = 1926460221999216768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981442873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 363913 + ... + 366599.

It is an arithmetic number, because the mean of its divisors is an integer number (22680000).

Almost surely, 2^981442872 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 981442872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1451520000).

981442872 is an abundant number, since it is smaller than the sum of its proper divisors (1921597128).

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

981442872 is a wasteful number, since it uses less digits than its factorization.

981442872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810 (or 2800 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 981442872 is about 31327.9886363616. The cubic root of 981442872 is about 993.7756282461.

The spelling of 981442872 in words is "nine hundred eighty-one million, four hundred forty-two thousand, eight hundred seventy-two".