28356544 has 56 divisors (see below), whose sum is σ = 60624720. Its totient is φ = 13111296.

The previous prime is 28356529. The next prime is 28356547. The reversal of 28356544 is 44565382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28356547) 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, 72702 + ... + 73090.

Almost surely, 2^28356544 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 28356544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30312360).

28356544 is an abundant number, since it is smaller than the sum of its proper divisors (32268176).

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

28356544 is a wasteful number, since it uses less digits than its factorization.

28356544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 485 (or 475 counting only the distinct ones).

The product of its digits is 115200, while the sum is 37.

The square root of 28356544 is about 5325.0862903807. The cubic root of 28356544 is about 304.9423666073.

It can be divided in two parts, 28356 and 544, that added together give a square (28900 = 170²).

The spelling of 28356544 in words is "twenty-eight million, three hundred fifty-six thousand, five hundred forty-four".