28125552 has 160 divisors (see below), whose sum is σ = 91994112. Its totient is φ = 7206912.

The previous prime is 28125541. The next prime is 28125553. The reversal of 28125552 is 25552182.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28125553) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 205228 + ... + 205364.

Almost surely, 2^28125552 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28125552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45997056).

28125552 is an abundant number, since it is smaller than the sum of its proper divisors (63868560).

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

28125552 is a wasteful number, since it uses less digits than its factorization.

28125552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215 (or 209 counting only the distinct ones).

The product of its digits is 8000, while the sum is 30.

The square root of 28125552 is about 5303.3529017028. The cubic root of 28125552 is about 304.1120893215.

The spelling of 28125552 in words is "twenty-eight million, one hundred twenty-five thousand, five hundred fifty-two".