28166816 has 24 divisors (see below), whose sum is σ = 58373280. Its totient is φ = 13341888.

The previous prime is 28166813. The next prime is 28166819. The reversal of 28166816 is 61866182.

It is an interprime number because it is at equal distance from previous prime (28166813) and next prime (28166819).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a self number, because there is not a number n which added to its sum of digits gives 28166816.

It is not an unprimeable number, because it can be changed into a prime (28166813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22556 + ... + 23771.

It is an arithmetic number, because the mean of its divisors is an integer number (2432220).

Almost surely, 2^28166816 is an apocalyptic number.

It is an amenable number.

28166816 is an abundant number, since it is smaller than the sum of its proper divisors (30206464).

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

28166816 is a wasteful number, since it uses less digits than its factorization.

28166816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46356 (or 46348 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 28166816 is about 5307.2418448757. The cubic root of 28166816 is about 304.2607412103.

It can be divided in two parts, 28166 and 816, that added together give a palindrome (28982).

The spelling of 28166816 in words is "twenty-eight million, one hundred sixty-six thousand, eight hundred sixteen".