28173748 has 12 divisors (see below), whose sum is σ = 49792932. Its totient is φ = 13947200.

The previous prime is 28173721. The next prime is 28173757. The reversal of 28173748 is 84737182.

It can be written as a sum of positive squares in 2 ways, for example, as 21883684 + 6290064 = 4678^2 + 2508^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 28173748.

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, 34465 + ... + 35272.

It is an arithmetic number, because the mean of its divisors is an integer number (4149411).

Almost surely, 2^28173748 is an apocalyptic number.

It is an amenable number.

28173748 is a deficient number, since it is larger than the sum of its proper divisors (21619184).

28173748 is a wasteful number, since it uses less digits than its factorization.

28173748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69842 (or 69840 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The square root of 28173748 is about 5307.8948746184. The cubic root of 28173748 is about 304.2856992135.

The spelling of 28173748 in words is "twenty-eight million, one hundred seventy-three thousand, seven hundred forty-eight".