28055888 has 20 divisors (see below), whose sum is σ = 62124000. Its totient is φ = 12023904.

The previous prime is 28055887. The next prime is 28055897. The reversal of 28055888 is 88855082.

It is a happy number.

It is a super-3 number, since 3×28055888³ (a number of 23 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28055887) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125138 + ... + 125361.

It is an arithmetic number, because the mean of its divisors is an integer number (3106200).

Almost surely, 2^28055888 is an apocalyptic number.

28055888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28055888 is an abundant number, since it is smaller than the sum of its proper divisors (34068112).

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

28055888 is a wasteful number, since it uses less digits than its factorization.

28055888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 250514 (or 250508 counting only the distinct ones).

The product of its (nonzero) digits is 204800, while the sum is 44.

The square root of 28055888 is about 5296.7809091938. The cubic root of 28055888 is about 303.8607973025.

The spelling of 28055888 in words is "twenty-eight million, fifty-five thousand, eight hundred eighty-eight".