28816290 has 32 divisors (see below), whose sum is σ = 76844160. Its totient is φ = 7684272.

The previous prime is 28816289. The next prime is 28816349. The reversal of 28816290 is 9261882.

28816290 is a `hidden beast` number, since 28 + 8 + 1 + 629 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 53094 + ... + 53633.

It is an arithmetic number, because the mean of its divisors is an integer number (2401380).

Almost surely, 2^28816290 is an apocalyptic number.

28816290 is an abundant number, since it is smaller than the sum of its proper divisors (48027870).

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

28816290 is a wasteful number, since it uses less digits than its factorization.

28816290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106743 (or 106737 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 28816290 is about 5368.0806625832. The cubic root of 28816290 is about 306.5815545676.

The spelling of 28816290 in words is "twenty-eight million, eight hundred sixteen thousand, two hundred ninety".