28274180 has 24 divisors (see below), whose sum is σ = 64774080. Its totient is φ = 10281440.

The previous prime is 28274161. The next prime is 28274203. The reversal of 28274180 is 8147282.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64040 + ... + 64479.

It is an arithmetic number, because the mean of its divisors is an integer number (2698920).

Almost surely, 2^28274180 is an apocalyptic number.

28274180 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28274180 is an abundant number, since it is smaller than the sum of its proper divisors (36499900).

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

28274180 is a wasteful number, since it uses less digits than its factorization.

28274180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128539 (or 128537 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 28274180 is about 5317.3470828976. The cubic root of 28274180 is about 304.6468365895.

It can be divided in two parts, 2827 and 4180, that added together give a palindrome (7007).

The spelling of 28274180 in words is "twenty-eight million, two hundred seventy-four thousand, one hundred eighty".