28892791 has 8 divisors (see below), whose sum is σ = 29529360. Its totient is φ = 28259712.

The previous prime is 28892789. The next prime is 28892803. The reversal of 28892791 is 19729882.

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 28892791 - 2¹ = 28892789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28892191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22320 + ... + 23578.

It is an arithmetic number, because the mean of its divisors is an integer number (3691170).

Almost surely, 2^28892791 is an apocalyptic number.

28892791 is a deficient number, since it is larger than the sum of its proper divisors (636569).

28892791 is a wasteful number, since it uses less digits than its factorization.

28892791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745.

The product of its digits is 145152, while the sum is 46.

The square root of 28892791 is about 5375.2014845957. The cubic root of 28892791 is about 306.8526173490.

The spelling of 28892791 in words is "twenty-eight million, eight hundred ninety-two thousand, seven hundred ninety-one".