28166058 has 12 divisors (see below), whose sum is σ = 61026498. Its totient is φ = 9388680.

The previous prime is 28166027. The next prime is 28166077. The reversal of 28166058 is 85066182.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 18636489 + 9529569 = 4317^2 + 3087^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 782373 + ... + 782408.

Almost surely, 2^28166058 is an apocalyptic number.

28166058 is an abundant number, since it is smaller than the sum of its proper divisors (32860440).

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

28166058 is a wasteful number, since it uses less digits than its factorization.

28166058 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564789 (or 1564786 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 28166058 is about 5307.1704325375. The cubic root of 28166058 is about 304.2580118554.

The spelling of 28166058 in words is "twenty-eight million, one hundred sixty-six thousand, fifty-eight".