13911281238 has 32 divisors (see below), whose sum is σ = 28581924960. Its totient is φ = 4510598400.

The previous prime is 13911281231. The next prime is 13911281239. The reversal of 13911281238 is 83218211931.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 13911281196 and 13911281205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13911281231) 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 15 ways as a sum of consecutive naturals, for example, 1400088 + ... + 1409988.

It is an arithmetic number, because the mean of its divisors is an integer number (893185155).

Almost surely, 2^13911281238 is an apocalyptic number.

13911281238 is an abundant number, since it is smaller than the sum of its proper divisors (14670643722).

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

13911281238 is a wasteful number, since it uses less digits than its factorization.

13911281238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16272.

The product of its digits is 20736, while the sum is 39.

The spelling of 13911281238 in words is "thirteen billion, nine hundred eleven million, two hundred eighty-one thousand, two hundred thirty-eight".