28054091 has 8 divisors (see below), whose sum is σ = 30283344. Its totient is φ = 25835040.

The previous prime is 28054067. The next prime is 28054111. The reversal of 28054091 is 19045082.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28054091 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28054591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3761 + ... + 8381.

It is an arithmetic number, because the mean of its divisors is an integer number (3785418).

Almost surely, 2^28054091 is an apocalyptic number.

28054091 is a deficient number, since it is larger than the sum of its proper divisors (2229253).

28054091 is a wasteful number, since it uses less digits than its factorization.

28054091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5101.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 28054091 is about 5296.6112751456. The cubic root of 28054091 is about 303.8543096624.

Subtracting from 28054091 its reverse (19045082), we obtain a palindrome (9009009).

The spelling of 28054091 in words is "twenty-eight million, fifty-four thousand, ninety-one".