28680136 has 16 divisors (see below), whose sum is σ = 54687600. Its totient is φ = 14096784.

The previous prime is 28680133. The next prime is 28680137. The reversal of 28680136 is 63108682.

It is not an unprimeable number, because it can be changed into a prime (28680133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29910 + ... + 30853.

It is an arithmetic number, because the mean of its divisors is an integer number (3417975).

Almost surely, 2^28680136 is an apocalyptic number.

It is an amenable number.

28680136 is a deficient number, since it is larger than the sum of its proper divisors (26007464).

28680136 is a wasteful number, since it uses less digits than its factorization.

28680136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60828 (or 60824 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28680136 is about 5355.3838331160. The cubic root of 28680136 is about 306.0979366696.

The spelling of 28680136 in words is "twenty-eight million, six hundred eighty thousand, one hundred thirty-six".