28166480 has 20 divisors (see below), whose sum is σ = 65487252. Its totient is φ = 11266560.

The previous prime is 28166477. The next prime is 28166497. The reversal of 28166480 is 8466182.

It can be written as a sum of positive squares in 2 ways, for example, as 18079504 + 10086976 = 4252^2 + 3176^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 28166480.

It is a congruent number.

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, 175961 + ... + 176120.

Almost surely, 2^28166480 is an apocalyptic number.

28166480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28166480 is an abundant number, since it is smaller than the sum of its proper divisors (37320772).

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

28166480 is a wasteful number, since it uses less digits than its factorization.

28166480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352094 (or 352088 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 28166480 is about 5307.2101899209. The cubic root of 28166480 is about 304.2595313703.

The spelling of 28166480 in words is "twenty-eight million, one hundred sixty-six thousand, four hundred eighty".