28591343913 has 32 divisors (see below), whose sum is σ = 42087112704. Its totient is φ = 17120600000.

The previous prime is 28591343897. The next prime is 28591343933. The reversal of 28591343913 is 31934319582.

It is a cyclic number.

It is not a de Polignac number, because 28591343913 - 2⁴ = 28591343897 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28591343933) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1627768 + ... + 1645238.

It is an arithmetic number, because the mean of its divisors is an integer number (1315222272).

Almost surely, 2^28591343913 is an apocalyptic number.

It is an amenable number.

28591343913 is a deficient number, since it is larger than the sum of its proper divisors (13495768791).

28591343913 is a wasteful number, since it uses less digits than its factorization.

28591343913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18077.

The product of its digits is 699840, while the sum is 48.

The spelling of 28591343913 in words is "twenty-eight billion, five hundred ninety-one million, three hundred forty-three thousand, nine hundred thirteen".