28885090 has 16 divisors (see below), whose sum is σ = 55992888. Its totient is φ = 10665216.

The previous prime is 28885081. The next prime is 28885093. The reversal of 28885090 is 9058882.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 16232841 + 12652249 = 4029^2 + 3557^2 .

It is not an unprimeable number, because it can be changed into a prime (28885093) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110967 + ... + 111226.

Almost surely, 2^28885090 is an apocalyptic number.

28885090 is a deficient number, since it is larger than the sum of its proper divisors (27107798).

28885090 is a wasteful number, since it uses less digits than its factorization.

28885090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222213.

The product of its (nonzero) digits is 46080, while the sum is 40.

The square root of 28885090 is about 5374.4850916158. The cubic root of 28885090 is about 306.8253523934.

The spelling of 28885090 in words is "twenty-eight million, eight hundred eighty-five thousand, ninety".