981161244 has 36 divisors (see below), whose sum is σ = 2834466544. Its totient is φ = 280331712.

The previous prime is 981161243. The next prime is 981161261. The reversal of 981161244 is 442161189.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 981161199 and 981161208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981161243) 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 11 ways as a sum of consecutive naturals, for example, 1946497 + ... + 1947000.

Almost surely, 2^981161244 is an apocalyptic number.

It is an amenable number.

981161244 is an abundant number, since it is smaller than the sum of its proper divisors (1853305300).

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

981161244 is a wasteful number, since it uses less digits than its factorization.

981161244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3893514 (or 3893509 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 981161244 is about 31323.4934833265. The cubic root of 981161244 is about 993.6805635120.

The spelling of 981161244 in words is "nine hundred eighty-one million, one hundred sixty-one thousand, two hundred forty-four".