28172248 has 32 divisors (see below), whose sum is σ = 58282560. Its totient is φ = 12683520.

The previous prime is 28172201. The next prime is 28172299. The reversal of 28172248 is 84227182.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 961 + ... + 7567.

It is an arithmetic number, because the mean of its divisors is an integer number (1821330).

Almost surely, 2^28172248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28172248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29141280).

28172248 is an abundant number, since it is smaller than the sum of its proper divisors (30110312).

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

28172248 is a wasteful number, since it uses less digits than its factorization.

28172248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6667 (or 6663 counting only the distinct ones).

The product of its digits is 14336, while the sum is 34.

The square root of 28172248 is about 5307.7535737824. The cubic root of 28172248 is about 304.2802989541.

The spelling of 28172248 in words is "twenty-eight million, one hundred seventy-two thousand, two hundred forty-eight".