28686468 has 12 divisors (see below), whose sum is σ = 66935120. Its totient is φ = 9562152.

The previous prime is 28686431. The next prime is 28686473. The reversal of 28686468 is 86468682.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1195258 + ... + 1195281.

Almost surely, 2^28686468 is an apocalyptic number.

It is an amenable number.

28686468 is an abundant number, since it is smaller than the sum of its proper divisors (38248652).

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

28686468 is a wasteful number, since it uses less digits than its factorization.

28686468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2390546 (or 2390544 counting only the distinct ones).

The product of its digits is 884736, while the sum is 48.

The square root of 28686468 is about 5355.9749812709. The cubic root of 28686468 is about 306.1204617779.

The spelling of 28686468 in words is "twenty-eight million, six hundred eighty-six thousand, four hundred sixty-eight".