28444180 has 24 divisors (see below), whose sum is σ = 60627168. Its totient is φ = 11207328.

The previous prime is 28444177. The next prime is 28444181. The reversal of 28444180 is 8144482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28444181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9274 + ... + 11953.

It is an arithmetic number, because the mean of its divisors is an integer number (2526132).

Almost surely, 2^28444180 is an apocalyptic number.

28444180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28444180 is an abundant number, since it is smaller than the sum of its proper divisors (32182988).

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

28444180 is a wasteful number, since it uses less digits than its factorization.

28444180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21303 (or 21301 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The square root of 28444180 is about 5333.3085416090. The cubic root of 28444180 is about 305.2561853655.

The spelling of 28444180 in words is "twenty-eight million, four hundred forty-four thousand, one hundred eighty".