28166454 has 20 divisors (see below), whose sum is σ = 63114084. Its totient is φ = 9388764.

The previous prime is 28166447. The next prime is 28166471. The reversal of 28166454 is 45466182.

28166454 is a `hidden beast` number, since 2 + 8 + 1 + 6 + 645 + 4 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 86772 + ... + 87095.

Almost surely, 2^28166454 is an apocalyptic number.

28166454 is an abundant number, since it is smaller than the sum of its proper divisors (34947630).

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

28166454 is a wasteful number, since it uses less digits than its factorization.

28166454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173881 (or 173872 counting only the distinct ones).

The product of its digits is 46080, while the sum is 36.

The square root of 28166454 is about 5307.2077404225. The cubic root of 28166454 is about 304.2594377514.

The spelling of 28166454 in words is "twenty-eight million, one hundred sixty-six thousand, four hundred fifty-four".