28520250 has 64 divisors (see below), whose sum is σ = 77680512. Its totient is φ = 6912000.

The previous prime is 28520243. The next prime is 28520251. The reversal of 28520250 is 5202582.

It is a self number, because there is not a number n which added to its sum of digits gives 28520250.

It is not an unprimeable number, because it can be changed into a prime (28520251) 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, 6522 + ... + 9978.

It is an arithmetic number, because the mean of its divisors is an integer number (1213758).

Almost surely, 2^28520250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28520250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38840256).

28520250 is an abundant number, since it is smaller than the sum of its proper divisors (49160262).

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

28520250 is a wasteful number, since it uses less digits than its factorization.

28520250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3488 (or 3478 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 28520250 is about 5340.4353755101. The cubic root of 28520250 is about 305.5280648668.

The spelling of 28520250 in words is "twenty-eight million, five hundred twenty thousand, two hundred fifty".