13138297928 has 32 divisors (see below), whose sum is σ = 28171143360. Its totient is φ = 5627169600.

The previous prime is 13138297813. The next prime is 13138297937. The reversal of 13138297928 is 82979283131.

It is a happy number.

It is a super-2 number, since 2×13138297928² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13138297928.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17603 + ... + 163053.

It is an arithmetic number, because the mean of its divisors is an integer number (880348230).

Almost surely, 2^13138297928 is an apocalyptic number.

It is an amenable number.

13138297928 is an abundant number, since it is smaller than the sum of its proper divisors (15032845432).

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

13138297928 is a wasteful number, since it uses less digits than its factorization.

13138297928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147077 (or 147073 counting only the distinct ones).

The product of its digits is 1306368, while the sum is 53.

The spelling of 13138297928 in words is "thirteen billion, one hundred thirty-eight million, two hundred ninety-seven thousand, nine hundred twenty-eight".