28686627 has 12 divisors (see below), whose sum is σ = 42020784. Its totient is φ = 18854640.

The previous prime is 28686617. The next prime is 28686629. The reversal of 28686627 is 72668682.

It is a happy number.

It is not a de Polignac number, because 28686627 - 2⁴ = 28686611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28686629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21808 + ... + 23085.

It is an arithmetic number, because the mean of its divisors is an integer number (3501732).

Almost surely, 2^28686627 is an apocalyptic number.

28686627 is a deficient number, since it is larger than the sum of its proper divisors (13334157).

28686627 is a wasteful number, since it uses less digits than its factorization.

28686627 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44970 (or 44967 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 28686627 is about 5355.9898244862. The cubic root of 28686627 is about 306.1210273531.

The spelling of 28686627 in words is "twenty-eight million, six hundred eighty-six thousand, six hundred twenty-seven".