28265994 has 24 divisors (see below), whose sum is σ = 61878180. Its totient is φ = 9324288.

The previous prime is 28265983. The next prime is 28266059. The reversal of 28265994 is 49956282.

It can be written as a sum of positive squares in 2 ways, for example, as 28227969 + 38025 = 5313^2 + 195^2 .

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 11 ways as a sum of consecutive naturals, for example, 6349 + ... + 9840.

Almost surely, 2^28265994 is an apocalyptic number.

28265994 is an abundant number, since it is smaller than the sum of its proper divisors (33612186).

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

28265994 is a wasteful number, since it uses less digits than its factorization.

28265994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16294 (or 16291 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 28265994 is about 5316.5772824252. The cubic root of 28265994 is about 304.6174330876.

The spelling of 28265994 in words is "twenty-eight million, two hundred sixty-five thousand, nine hundred ninety-four".