28580059991 has 16 divisors (see below), whose sum is σ = 33000264000. Its totient is φ = 24244396800.

The previous prime is 28580059979. The next prime is 28580059993. The reversal of 28580059991 is 19995008582.

It is a cyclic number.

It is not a de Polignac number, because 28580059991 - 2²² = 28575865687 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 (28580059993) 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, 1998635 + ... + 2012883.

It is an arithmetic number, because the mean of its divisors is an integer number (2062516500).

Almost surely, 2^28580059991 is an apocalyptic number.

28580059991 is a deficient number, since it is larger than the sum of its proper divisors (4420204009).

28580059991 is a wasteful number, since it uses less digits than its factorization.

28580059991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17194.

The product of its (nonzero) digits is 2332800, while the sum is 56.

The spelling of 28580059991 in words is "twenty-eight billion, five hundred eighty million, fifty-nine thousand, nine hundred ninety-one".