13898981402 has 16 divisors (see below), whose sum is σ = 21500818152. Its totient is φ = 6733601280.

The previous prime is 13898981359. The next prime is 13898981407. The reversal of 13898981402 is 20418989831.

It can be written as a sum of positive squares in 4 ways, for example, as 13167333001 + 731648401 = 114749^2 + 27049^2 .

It is a Smith number, since the sum of its digits (53) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (13898981407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371843 + ... + 407510.

Almost surely, 2^13898981402 is an apocalyptic number.

13898981402 is a deficient number, since it is larger than the sum of its proper divisors (7601836750).

13898981402 is a wasteful number, since it uses less digits than its factorization.

13898981402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779633.

The product of its (nonzero) digits is 995328, while the sum is 53.

The spelling of 13898981402 in words is "thirteen billion, eight hundred ninety-eight million, nine hundred eighty-one thousand, four hundred two".