28755888 has 120 divisors (see below), whose sum is σ = 90065664. Its totient is φ = 7729920.

The previous prime is 28755871. The next prime is 28755967. The reversal of 28755888 is 88855782.

It is a self number, because there is not a number n which added to its sum of digits gives 28755888.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 471378 + ... + 471438.

Almost surely, 2^28755888 is an apocalyptic number.

28755888 is a gapful number since it is divisible by the number (28) 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 28755888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45032832).

28755888 is an abundant number, since it is smaller than the sum of its proper divisors (61309776).

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

28755888 is a wasteful number, since it uses less digits than its factorization.

28755888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163 (or 96 counting only the distinct ones).

The product of its digits is 1433600, while the sum is 51.

The square root of 28755888 is about 5362.4516781040. The cubic root of 28755888 is about 306.3671955735.

The spelling of 28755888 in words is "twenty-eight million, seven hundred fifty-five thousand, eight hundred eighty-eight".