28525252 has 48 divisors (see below), whose sum is σ = 61689600. Its totient is φ = 11496576.

The previous prime is 28525229. The next prime is 28525253. The reversal of 28525252 is 25252582.

It is not an unprimeable number, because it can be changed into a prime (28525253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22713 + ... + 23935.

It is an arithmetic number, because the mean of its divisors is an integer number (1285200).

Almost surely, 2^28525252 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 28525252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30844800).

28525252 is an abundant number, since it is smaller than the sum of its proper divisors (33164348).

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

28525252 is a wasteful number, since it uses less digits than its factorization.

28525252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265 (or 1249 counting only the distinct ones).

The product of its digits is 16000, while the sum is 31.

The square root of 28525252 is about 5340.9036688560. The cubic root of 28525252 is about 305.5459254167.

The spelling of 28525252 in words is "twenty-eight million, five hundred twenty-five thousand, two hundred fifty-two".