28496591 has 4 divisors (see below), whose sum is σ = 28542384. Its totient is φ = 28450800.

The previous prime is 28496581. The next prime is 28496593. The reversal of 28496591 is 19569482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28496591 - 2⁶ = 28496527 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 (28496593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21950 + ... + 23211.

It is an arithmetic number, because the mean of its divisors is an integer number (7135596).

Almost surely, 2^28496591 is an apocalyptic number.

28496591 is a deficient number, since it is larger than the sum of its proper divisors (45793).

28496591 is an equidigital number, since it uses as much as digits as its factorization.

28496591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45792.

The product of its digits is 155520, while the sum is 44.

The square root of 28496591 is about 5338.2198343643. The cubic root of 28496591 is about 305.4435577978.

The spelling of 28496591 in words is "twenty-eight million, four hundred ninety-six thousand, five hundred ninety-one".