28748544 has 144 divisors (see below), whose sum is σ = 86534784. Its totient is φ = 8396800.

The previous prime is 28748543. The next prime is 28748579. The reversal of 28748544 is 44584782.

Its product of digits (286720) is a multiple of the sum of its prime divisors (140).

It is a junction number, because it is equal to n+sod(n) for n = 28748496 and 28748505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28748543) 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 15 ways as a sum of consecutive naturals, for example, 346327 + ... + 346409.

It is an arithmetic number, because the mean of its divisors is an integer number (600936).

Almost surely, 2^28748544 is an apocalyptic number.

28748544 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 28748544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43267392).

28748544 is an abundant number, since it is smaller than the sum of its proper divisors (57786240).

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

28748544 is a wasteful number, since it uses less digits than its factorization.

28748544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154 (or 140 counting only the distinct ones).

The product of its digits is 286720, while the sum is 42.

The square root of 28748544 is about 5361.7668729627. The cubic root of 28748544 is about 306.3411121937.

It can be divided in two parts, 28748 and 544, that added together give a palindrome (29292).

The spelling of 28748544 in words is "twenty-eight million, seven hundred forty-eight thousand, five hundred forty-four".