28244090 has 24 divisors (see below), whose sum is σ = 59140692. Its totient is φ = 9683520.

The previous prime is 28244059. The next prime is 28244101. The reversal of 28244090 is 9044282.

It can be written as a sum of positive squares in 2 ways, for example, as 23804641 + 4439449 = 4879^2 + 2107^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28331 + ... + 29310.

Almost surely, 2^28244090 is an apocalyptic number.

28244090 is an abundant number, since it is smaller than the sum of its proper divisors (30896602).

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

28244090 is a wasteful number, since it uses less digits than its factorization.

28244090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57662 (or 57655 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 28244090 is about 5314.5169112536. The cubic root of 28244090 is about 304.5387276237.

The spelling of 28244090 in words is "twenty-eight million, two hundred forty-four thousand, ninety".