28064090 has 16 divisors (see below), whose sum is σ = 51748200. Its totient is φ = 10951680.

The previous prime is 28064063. The next prime is 28064111. The reversal of 28064090 is 9046082.

It can be written as a sum of positive squares in 4 ways, for example, as 7912969 + 20151121 = 2813^2 + 4489^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33815 + ... + 34634.

Almost surely, 2^28064090 is an apocalyptic number.

28064090 is a deficient number, since it is larger than the sum of its proper divisors (23684110).

28064090 is a wasteful number, since it uses less digits than its factorization.

28064090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68497.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 28064090 is about 5297.5550964572. Note that the first 3 decimals coincide. The cubic root of 28064090 is about 303.8904051508.

The spelling of 28064090 in words is "twenty-eight million, sixty-four thousand, ninety".