83940220 has 96 divisors (see below), whose sum is σ = 229799808. Its totient is φ = 24993792.

The previous prime is 83940187. The next prime is 83940251. The reversal of 83940220 is 2204938.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29584 + ... + 32296.

It is an arithmetic number, because the mean of its divisors is an integer number (2393748).

Almost surely, 2^83940220 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 83940220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114899904).

83940220 is an abundant number, since it is smaller than the sum of its proper divisors (145859588).

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

83940220 is a wasteful number, since it uses less digits than its factorization.

83940220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2759 (or 2757 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 83940220 is about 9161.8895431019. The cubic root of 83940220 is about 437.8479974073.

The spelling of 83940220 in words is "eighty-three million, nine hundred forty thousand, two hundred twenty".