12888888887 has 16 divisors (see below), whose sum is σ = 15509160960. Its totient is φ = 10463647392.

The previous prime is 12888888877. The next prime is 12888888889. The reversal of 12888888887 is 78888888821.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 12888888887 - 2⁶ = 12888888823 is a prime.

It is a super-2 number, since 2×12888888887² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12888888889) 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, 710978 + ... + 728880.

It is an arithmetic number, because the mean of its divisors is an integer number (969322560).

Almost surely, 2^12888888887 is an apocalyptic number.

12888888887 is a deficient number, since it is larger than the sum of its proper divisors (2620272073).

12888888887 is a wasteful number, since it uses less digits than its factorization.

12888888887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23342.

The product of its digits is 234881024, while the sum is 74.

The spelling of 12888888887 in words is "twelve billion, eight hundred eighty-eight million, eight hundred eighty-eight thousand, eight hundred eighty-seven".