28553628 has 24 divisors (see below), whose sum is σ = 68044032. Its totient is φ = 9315184.

The previous prime is 28553627. The next prime is 28553633. The reversal of 28553628 is 82635582.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28553621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24750 + ... + 25877.

It is an arithmetic number, because the mean of its divisors is an integer number (2835168).

Almost surely, 2^28553628 is an apocalyptic number.

It is an amenable number.

28553628 is an abundant number, since it is smaller than the sum of its proper divisors (39490404).

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

28553628 is a wasteful number, since it uses less digits than its factorization.

28553628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50681 (or 50679 counting only the distinct ones).

The product of its digits is 115200, while the sum is 39.

The square root of 28553628 is about 5343.5594878321. The cubic root of 28553628 is about 305.6472075816.

The spelling of 28553628 in words is "twenty-eight million, five hundred fifty-three thousand, six hundred twenty-eight".