28855334405881 has 16 divisors (see below), whose sum is σ = 29260521658368. Its totient is φ = 28452743715600.

The previous prime is 28855334405851. The next prime is 28855334405959. The reversal of 28855334405881 is 18850443355882.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28855334405881 is a prime.

It is a super-2 number, since 2×28855334405881² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28855334405851) 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, 30234096 + ... + 31173886.

It is an arithmetic number, because the mean of its divisors is an integer number (1828782603648).

Almost surely, 2^{28855334405881} is an apocalyptic number.

It is an amenable number.

28855334405881 is a deficient number, since it is larger than the sum of its proper divisors (405187252487).

28855334405881 is a wasteful number, since it uses less digits than its factorization.

28855334405881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941172.

The product of its (nonzero) digits is 147456000, while the sum is 64.

The spelling of 28855334405881 in words is "twenty-eight trillion, eight hundred fifty-five billion, three hundred thirty-four million, four hundred five thousand, eight hundred eighty-one".