28100628 has 24 divisors (see below), whose sum is σ = 72853760. Its totient is φ = 9366840.

The previous prime is 28100617. The next prime is 28100651. The reversal of 28100628 is 82600182.

28100628 is a `hidden beast` number, since 28 + 10 + 0 + 628 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 129988 + ... + 130203.

Almost surely, 2^28100628 is an apocalyptic number.

It is an amenable number.

28100628 is an abundant number, since it is smaller than the sum of its proper divisors (44753132).

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

28100628 is a wasteful number, since it uses less digits than its factorization.

28100628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260204 (or 260196 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 28100628 is about 5301.0025466887. The cubic root of 28100628 is about 304.0222311766.

Subtracting from 28100628 its sum of digits (27), we obtain a square (28100601 = 5301²).

The spelling of 28100628 in words is "twenty-eight million, one hundred thousand, six hundred twenty-eight".