28015044 has 72 divisors (see below), whose sum is σ = 71688960. Its totient is φ = 8503488.

The previous prime is 28015027. The next prime is 28015051. The reversal of 28015044 is 44051082.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 125517 + ... + 125739.

It is an arithmetic number, because the mean of its divisors is an integer number (995680).

Almost surely, 2^28015044 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 28015044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35844480).

28015044 is an abundant number, since it is smaller than the sum of its proper divisors (43673916).

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

28015044 is a wasteful number, since it uses less digits than its factorization.

28015044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297 (or 276 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 28015044 is about 5292.9239556223. The cubic root of 28015044 is about 303.7132713131.

The spelling of 28015044 in words is "twenty-eight million, fifteen thousand, forty-four".