28055628 has 36 divisors (see below), whose sum is σ = 74652760. Its totient is φ = 8859456.

The previous prime is 28055623. The next prime is 28055641. The reversal of 28055628 is 82655082.

28055628 is a `hidden beast` number, since 2 + 80 + 556 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a junction number, because it is equal to n+sod(n) for n = 28055592 and 28055601.

It is not an unprimeable number, because it can be changed into a prime (28055623) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19825 + ... + 21192.

Almost surely, 2^28055628 is an apocalyptic number.

It is an amenable number.

28055628 is an abundant number, since it is smaller than the sum of its proper divisors (46597132).

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

28055628 is a wasteful number, since it uses less digits than its factorization.

28055628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41046 (or 41041 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 28055628 is about 5296.7563659281. The cubic root of 28055628 is about 303.8598586516.

The spelling of 28055628 in words is "twenty-eight million, fifty-five thousand, six hundred twenty-eight".