28561548 has 12 divisors (see below), whose sum is σ = 66643640. Its totient is φ = 9520512.

The previous prime is 28561531. The next prime is 28561609. The reversal of 28561548 is 84516582.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1190053 + ... + 1190076.

Almost surely, 2^28561548 is an apocalyptic number.

It is an amenable number.

28561548 is an abundant number, since it is smaller than the sum of its proper divisors (38082092).

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

28561548 is a wasteful number, since it uses less digits than its factorization.

28561548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380136 (or 2380134 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 28561548 is about 5344.3005155025. The cubic root of 28561548 is about 305.6754643774.

The spelling of 28561548 in words is "twenty-eight million, five hundred sixty-one thousand, five hundred forty-eight".