28444518 has 12 divisors (see below), whose sum is σ = 61629828. Its totient is φ = 9481500.

The previous prime is 28444513. The next prime is 28444561. The reversal of 28444518 is 81544482.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28444511) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 790108 + ... + 790143.

It is an arithmetic number, because the mean of its divisors is an integer number (5135819).

Almost surely, 2^28444518 is an apocalyptic number.

28444518 is an abundant number, since it is smaller than the sum of its proper divisors (33185310).

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

28444518 is a wasteful number, since it uses less digits than its factorization.

28444518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580259 (or 1580256 counting only the distinct ones).

The product of its digits is 40960, while the sum is 36.

The square root of 28444518 is about 5333.3402291622. The cubic root of 28444518 is about 305.2573944726.

Subtracting from 28444518 its sum of digits (36), we obtain a palindrome (28444482).

The spelling of 28444518 in words is "twenty-eight million, four hundred forty-four thousand, five hundred eighteen".