28245658 has 24 divisors (see below), whose sum is σ = 49537332. Its totient is φ = 12043584.

The previous prime is 28245641. The next prime is 28245667. The reversal of 28245658 is 85654282.

It can be written as a sum of positive squares in 2 ways, for example, as 28227969 + 17689 = 5313^2 + 133^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28245658.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22216 + ... + 23452.

Almost surely, 2^28245658 is an apocalyptic number.

28245658 is a deficient number, since it is larger than the sum of its proper divisors (21291674).

28245658 is a wasteful number, since it uses less digits than its factorization.

28245658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486 (or 1479 counting only the distinct ones).

The product of its digits is 153600, while the sum is 40.

The square root of 28245658 is about 5314.6644296700. The cubic root of 28245658 is about 304.5443631140.

The spelling of 28245658 in words is "twenty-eight million, two hundred forty-five thousand, six hundred fifty-eight".