28125560 has 16 divisors (see below), whose sum is σ = 63282600. Its totient is φ = 11250208.

The previous prime is 28125557. The next prime is 28125577. The reversal of 28125560 is 6552182.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 351530 + ... + 351609.

Almost surely, 2^28125560 is an apocalyptic number.

28125560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28125560 is an abundant number, since it is smaller than the sum of its proper divisors (35157040).

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

28125560 is a wasteful number, since it uses less digits than its factorization.

28125560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 703150 (or 703146 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 28125560 is about 5303.3536559426. The cubic root of 28125560 is about 304.1121181553.

The spelling of 28125560 in words is "twenty-eight million, one hundred twenty-five thousand, five hundred sixty".