28686546 has 24 divisors (see below), whose sum is σ = 71033664. Its totient is φ = 8196120.

The previous prime is 28686529. The next prime is 28686551. The reversal of 28686546 is 64568682.

28686546 is a `hidden beast` number, since 28 + 6 + 86 + 546 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113710 + ... + 113961.

It is an arithmetic number, because the mean of its divisors is an integer number (2959736).

Almost surely, 2^28686546 is an apocalyptic number.

28686546 is an abundant number, since it is smaller than the sum of its proper divisors (42347118).

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

28686546 is a wasteful number, since it uses less digits than its factorization.

28686546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227686 (or 227683 counting only the distinct ones).

The product of its digits is 552960, while the sum is 45.

The square root of 28686546 is about 5355.9822628534. The cubic root of 28686546 is about 306.1207392302.

The spelling of 28686546 in words is "twenty-eight million, six hundred eighty-six thousand, five hundred forty-six".