28745184 has 96 divisors (see below), whose sum is σ = 83994624. Its totient is φ = 8547840.

The previous prime is 28745183. The next prime is 28745191. The reversal of 28745184 is 48154782.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28745183) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38317 + ... + 39059.

It is an arithmetic number, because the mean of its divisors is an integer number (874944).

Almost surely, 2^28745184 is an apocalyptic number.

28745184 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 28745184, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41997312).

28745184 is an abundant number, since it is smaller than the sum of its proper divisors (55249440).

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

28745184 is a wasteful number, since it uses less digits than its factorization.

28745184 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800 (or 792 counting only the distinct ones).

The product of its digits is 71680, while the sum is 39.

The square root of 28745184 is about 5361.4535342573. The cubic root of 28745184 is about 306.3291771401.

The spelling of 28745184 in words is "twenty-eight million, seven hundred forty-five thousand, one hundred eighty-four".