83981544 has 64 divisors (see below), whose sum is σ = 215654400. Its totient is φ = 27244224.

The previous prime is 83981543. The next prime is 83981549. The reversal of 83981544 is 44518938.

It is a junction number, because it is equal to n+sod(n) for n = 83981496 and 83981505.

It is not an unprimeable number, because it can be changed into a prime (83981543) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 179599 + ... + 180065.

It is an arithmetic number, because the mean of its divisors is an integer number (3369600).

Almost surely, 2^83981544 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 83981544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107827200).

83981544 is an abundant number, since it is smaller than the sum of its proper divisors (131672856).

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

83981544 is a wasteful number, since it uses less digits than its factorization.

83981544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662 (or 658 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 83981544 is about 9164.1444772548. The cubic root of 83981544 is about 437.9198368754.

The spelling of 83981544 in words is "eighty-three million, nine hundred eighty-one thousand, five hundred forty-four".