83981144 has 16 divisors (see below), whose sum is σ = 169577520. Its totient is φ = 38760480.

The previous prime is 83981123. The next prime is 83981179. The reversal of 83981144 is 44118938.

It is a junction number, because it is equal to n+sod(n) for n = 83981098 and 83981107.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 403652 + ... + 403859.

It is an arithmetic number, because the mean of its divisors is an integer number (10598595).

Almost surely, 2^83981144 is an apocalyptic number.

It is an amenable number.

83981144 is an abundant number, since it is smaller than the sum of its proper divisors (85596376).

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

83981144 is a wasteful number, since it uses less digits than its factorization.

83981144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807530 (or 807526 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 83981144 is about 9164.1226530421. The cubic root of 83981144 is about 437.9191416107.

The spelling of 83981144 in words is "eighty-three million, nine hundred eighty-one thousand, one hundred forty-four".