28285087591 has 8 divisors (see below), whose sum is σ = 29790716544. Its totient is φ = 26802445560.

The previous prime is 28285087529. The next prime is 28285087619. The reversal of 28285087591 is 19578058282.

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

It is not a de Polignac number, because 28285087591 - 2⁷ = 28285087463 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 (28285087511) 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, 5744205 + ... + 5749126.

It is an arithmetic number, because the mean of its divisors is an integer number (3723839568).

Almost surely, 2^28285087591 is an apocalyptic number.

28285087591 is a deficient number, since it is larger than the sum of its proper divisors (1505628953).

28285087591 is a wasteful number, since it uses less digits than its factorization.

28285087591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11493461.

The product of its (nonzero) digits is 3225600, while the sum is 55.

The spelling of 28285087591 in words is "twenty-eight billion, two hundred eighty-five million, eighty-seven thousand, five hundred ninety-one".