28066635 has 64 divisors (see below), whose sum is σ = 52876800. Its totient is φ = 14103936.

The previous prime is 28066613. The next prime is 28066651. The reversal of 28066635 is 53666082.

It is not a de Polignac number, because 28066635 - 2⁵ = 28066603 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28066635.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 262252 + ... + 262358.

It is an arithmetic number, because the mean of its divisors is an integer number (826200).

Almost surely, 2^28066635 is an apocalyptic number.

28066635 is a deficient number, since it is larger than the sum of its proper divisors (24810165).

28066635 is a wasteful number, since it uses less digits than its factorization.

28066635 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217 (or 211 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 28066635 is about 5297.7952961586. The cubic root of 28066635 is about 303.8995910025.

The spelling of 28066635 in words is "twenty-eight million, sixty-six thousand, six hundred thirty-five".