28190011 has 8 divisors (see below), whose sum is σ = 28854144. Its totient is φ = 27530880.

The previous prime is 28189981. The next prime is 28190017. The reversal of 28190011 is 11009182.

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

It is a cyclic number.

It is not a de Polignac number, because 28190011 - 2⁵ = 28189979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28190017) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11670 + ... + 13876.

It is an arithmetic number, because the mean of its divisors is an integer number (3606768).

Almost surely, 2^28190011 is an apocalyptic number.

28190011 is a deficient number, since it is larger than the sum of its proper divisors (664133).

28190011 is a wasteful number, since it uses less digits than its factorization.

28190011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2501.

The product of its (nonzero) digits is 144, while the sum is 22.

The square root of 28190011 is about 5309.4266168768. The cubic root of 28190011 is about 304.3442365258.

Adding to 28190011 its reverse (11009182), we get a palindrome (39199193).

The spelling of 28190011 in words is "twenty-eight million, one hundred ninety thousand, eleven".