28105194 has 16 divisors (see below), whose sum is σ = 60534432. Its totient is φ = 8647728.

The previous prime is 28105183. The next prime is 28105229. The reversal of 28105194 is 49150182.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180084 + ... + 180239.

It is an arithmetic number, because the mean of its divisors is an integer number (3783402).

Almost surely, 2^28105194 is an apocalyptic number.

28105194 is an abundant number, since it is smaller than the sum of its proper divisors (32429238).

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

28105194 is a wasteful number, since it uses less digits than its factorization.

28105194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360341.

The product of its (nonzero) digits is 2880, while the sum is 30.

The square root of 28105194 is about 5301.4332024463. The cubic root of 28105194 is about 304.0386968861.

The spelling of 28105194 in words is "twenty-eight million, one hundred five thousand, one hundred ninety-four".