28825290 has 96 divisors (see below), whose sum is σ = 82083456. Its totient is φ = 6975360.

The previous prime is 28825273. The next prime is 28825297. The reversal of 28825290 is 9252882.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28825297) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82897 + ... + 83243.

It is an arithmetic number, because the mean of its divisors is an integer number (855036).

Almost surely, 2^28825290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28825290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41041728).

28825290 is an abundant number, since it is smaller than the sum of its proper divisors (53258166).

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

28825290 is a wasteful number, since it uses less digits than its factorization.

28825290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 441 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28825290 is about 5368.9188855858. The cubic root of 28825290 is about 306.6134687705.

The spelling of 28825290 in words is "twenty-eight million, eight hundred twenty-five thousand, two hundred ninety".