12998038878 has 48 divisors (see below), whose sum is σ = 30831330816. Its totient is φ = 3924864720.

The previous prime is 12998038877. The next prime is 12998038883. The reversal of 12998038878 is 87883089921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12998038877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59950 + ... + 172017.

It is an arithmetic number, because the mean of its divisors is an integer number (642319392).

Almost surely, 2^12998038878 is an apocalyptic number.

12998038878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12998038878 is an abundant number, since it is smaller than the sum of its proper divisors (17833291938).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12998038878 is a wasteful number, since it uses less digits than its factorization.

12998038878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232269 (or 232266 counting only the distinct ones).

The product of its (nonzero) digits is 13934592, while the sum is 63.

The spelling of 12998038878 in words is "twelve billion, nine hundred ninety-eight million, thirty-eight thousand, eight hundred seventy-eight".