28745152 has 56 divisors (see below), whose sum is σ = 59842400. Its totient is φ = 13685760.

The previous prime is 28745149. The next prime is 28745173. The reversal of 28745152 is 25154782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 144349 + ... + 144547.

Almost surely, 2^28745152 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 28745152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29921200).

28745152 is an abundant number, since it is smaller than the sum of its proper divisors (31097248).

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

28745152 is a wasteful number, since it uses less digits than its factorization.

28745152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309 (or 299 counting only the distinct ones).

The product of its digits is 22400, while the sum is 34.

The square root of 28745152 is about 5361.4505499911. The cubic root of 28745152 is about 306.3290634684.

The spelling of 28745152 in words is "twenty-eight million, seven hundred forty-five thousand, one hundred fifty-two".