83445228 has 54 divisors (see below), whose sum is σ = 219492364. Its totient is φ = 27720144.

The previous prime is 83445227. The next prime is 83445239. The reversal of 83445228 is 82254438.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a tau number, because it is divible by the number of its divisors (54).

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 = 83445192 and 83445201.

It is not an unprimeable number, because it can be changed into a prime (83445227) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 284650 + ... + 284942.

Almost surely, 2^83445228 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 83445228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109746182).

83445228 is an abundant number, since it is smaller than the sum of its proper divisors (136047136).

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

83445228 is an equidigital number, since it uses as much as digits as its factorization.

83445228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605 (or 298 counting only the distinct ones).

The product of its digits is 61440, while the sum is 36.

The square root of 83445228 is about 9134.8359591183. The cubic root of 83445228 is about 436.9856429225.

The spelling of 83445228 in words is "eighty-three million, four hundred forty-five thousand, two hundred twenty-eight".