28715544 has 96 divisors (see below), whose sum is σ = 91400400. Its totient is φ = 8029440.

The previous prime is 28715507. The next prime is 28715549. The reversal of 28715544 is 44551782.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28715499 and 28715508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28715549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8902 + ... + 11690.

Almost surely, 2^28715544 is an apocalyptic number.

28715544 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28715544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45700200).

28715544 is an abundant number, since it is smaller than the sum of its proper divisors (62684856).

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

28715544 is a wasteful number, since it uses less digits than its factorization.

28715544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2825 (or 2818 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 28715544 is about 5358.6886455550. The cubic root of 28715544 is about 306.2238526059.

The spelling of 28715544 in words is "twenty-eight million, seven hundred fifteen thousand, five hundred forty-four".