28251344 has 40 divisors (see below), whose sum is σ = 61118112. Its totient is φ = 12539520.

The previous prime is 28251343. The next prime is 28251373. The reversal of 28251344 is 44315282.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28251341) 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, 5702 + ... + 9434.

Almost surely, 2^28251344 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 28251344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30559056).

28251344 is an abundant number, since it is smaller than the sum of its proper divisors (32866768).

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

28251344 is a wasteful number, since it uses less digits than its factorization.

28251344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3795 (or 3789 counting only the distinct ones).

The product of its digits is 7680, while the sum is 29.

The square root of 28251344 is about 5315.1993377483. The cubic root of 28251344 is about 304.5647972053.

The spelling of 28251344 in words is "twenty-eight million, two hundred fifty-one thousand, three hundred forty-four".