28109298 has 32 divisors (see below), whose sum is σ = 64448640. Its totient is φ = 8006400.

The previous prime is 28109251. The next prime is 28109299. The reversal of 28109298 is 89290182.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28109299) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16008 + ... + 17676.

It is an arithmetic number, because the mean of its divisors is an integer number (2014020).

Almost surely, 2^28109298 is an apocalyptic number.

28109298 is an abundant number, since it is smaller than the sum of its proper divisors (36339342).

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

28109298 is a wasteful number, since it uses less digits than its factorization.

28109298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2082.

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 28109298 is about 5301.8202534601. The cubic root of 28109298 is about 304.0534950296.

The spelling of 28109298 in words is "twenty-eight million, one hundred nine thousand, two hundred ninety-eight".