28081194 has 8 divisors (see below), whose sum is σ = 56162400. Its totient is φ = 9360396.

The previous prime is 28081189. The next prime is 28081201. The reversal of 28081194 is 49118082.

It is a sphenic number, since it is the product of 3 distinct primes.

28081194 is an admirable number.

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 3 ways as a sum of consecutive naturals, for example, 2340094 + ... + 2340105.

It is an arithmetic number, because the mean of its divisors is an integer number (7020300).

Almost surely, 2^28081194 is an apocalyptic number.

28081194 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28081194 is a wasteful number, since it uses less digits than its factorization.

28081194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4680204.

The product of its (nonzero) digits is 4608, while the sum is 33.

The square root of 28081194 is about 5299.1691801640. The cubic root of 28081194 is about 303.9521291773.

The spelling of 28081194 in words is "twenty-eight million, eighty-one thousand, one hundred ninety-four".