28268660 has 24 divisors (see below), whose sum is σ = 67845120. Its totient is φ = 9692064.

The previous prime is 28268623. The next prime is 28268677. The reversal of 28268660 is 6686282.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100820 + ... + 101099.

It is an arithmetic number, because the mean of its divisors is an integer number (2826880).

Almost surely, 2^28268660 is an apocalyptic number.

28268660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28268660 is an abundant number, since it is smaller than the sum of its proper divisors (39576460).

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

28268660 is a wasteful number, since it uses less digits than its factorization.

28268660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201935 (or 201933 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 28268660 is about 5316.8280017319. The cubic root of 28268660 is about 304.6270097842.

The spelling of 28268660 in words is "twenty-eight million, two hundred sixty-eight thousand, six hundred sixty".