981112990 has 64 divisors (see below), whose sum is σ = 2095595712. Its totient is φ = 326016000.

The previous prime is 981112981. The next prime is 981113009. The reversal of 981112990 is 99211189.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

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, 141034 + ... + 147826.

It is an arithmetic number, because the mean of its divisors is an integer number (32743683).

Almost surely, 2^981112990 is an apocalyptic number.

981112990 is an abundant number, since it is smaller than the sum of its proper divisors (1114482722).

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

981112990 is a wasteful number, since it uses less digits than its factorization.

981112990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6925.

The product of its (nonzero) digits is 11664, while the sum is 40.

The square root of 981112990 is about 31322.7232213293. The cubic root of 981112990 is about 993.6642733428.

It can be divided in two parts, 98111 and 2990, that added together give a palindrome (101101).

The spelling of 981112990 in words is "nine hundred eighty-one million, one hundred twelve thousand, nine hundred ninety".