28755504 has 60 divisors (see below), whose sum is σ = 80838576. Its totient is φ = 9542016.

The previous prime is 28755481. The next prime is 28755511. The reversal of 28755504 is 40555782.

It is a happy number.

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

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56917 + ... + 57419.

Almost surely, 2^28755504 is an apocalyptic number.

28755504 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 28755504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40419288).

28755504 is an abundant number, since it is smaller than the sum of its proper divisors (52083072).

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

28755504 is a wasteful number, since it uses less digits than its factorization.

28755504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 914 (or 905 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 28755504 is about 5362.4158734660. The cubic root of 28755504 is about 306.3658318467.

The spelling of 28755504 in words is "twenty-eight million, seven hundred fifty-five thousand, five hundred four".