83987244 has 72 divisors (see below), whose sum is σ = 233513280. Its totient is φ = 25240800.

The previous prime is 83987243. The next prime is 83987251. The reversal of 83987244 is 44278938.

It is a self number, because there is not a number n which added to its sum of digits gives 83987244.

It is not an unprimeable number, because it can be changed into a prime (83987243) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51067 + ... + 52685.

It is an arithmetic number, because the mean of its divisors is an integer number (3243240).

Almost surely, 2^83987244 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 83987244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116756640).

83987244 is an abundant number, since it is smaller than the sum of its proper divisors (149526036).

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

83987244 is a wasteful number, since it uses less digits than its factorization.

83987244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1771 (or 1766 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 83987244 is about 9164.4554666385. The cubic root of 83987244 is about 437.9297441577.

The spelling of 83987244 in words is "eighty-three million, nine hundred eighty-seven thousand, two hundred forty-four".