13978692208 has 40 divisors (see below), whose sum is σ = 29174306336. Its totient is φ = 6450105600.

The previous prime is 13978692191. The next prime is 13978692239. The reversal of 13978692208 is 80229687931.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1424278 + ... + 1434058.

Almost surely, 2^13978692208 is an apocalyptic number.

It is an amenable number.

13978692208 is an abundant number, since it is smaller than the sum of its proper divisors (15195614128).

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

13978692208 is a wasteful number, since it uses less digits than its factorization.

13978692208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16673 (or 16667 counting only the distinct ones).

The product of its (nonzero) digits is 2612736, while the sum is 55.

The spelling of 13978692208 in words is "thirteen billion, nine hundred seventy-eight million, six hundred ninety-two thousand, two hundred eight".