28013017591 has 16 divisors (see below), whose sum is σ = 30592416960. Its totient is φ = 25494531840.

The previous prime is 28013017589. The next prime is 28013017619. The reversal of 28013017591 is 19571031082.

It is a cyclic number.

It is not a de Polignac number, because 28013017591 - 2¹ = 28013017589 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28013017591.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28013017091) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4761990 + ... + 4767868.

It is an arithmetic number, because the mean of its divisors is an integer number (1912026060).

Almost surely, 2^28013017591 is an apocalyptic number.

28013017591 is a deficient number, since it is larger than the sum of its proper divisors (2579399369).

28013017591 is a wasteful number, since it uses less digits than its factorization.

28013017591 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10986.

The product of its (nonzero) digits is 15120, while the sum is 37.

The spelling of 28013017591 in words is "twenty-eight billion, thirteen million, seventeen thousand, five hundred ninety-one".