13994117840 has 40 divisors (see below), whose sum is σ = 32580489120. Its totient is φ = 5590048896.

The previous prime is 13994117801. The next prime is 13994117849. The reversal of 13994117840 is 4871149931.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13994117849) 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, 59234 + ... + 177473.

It is an arithmetic number, because the mean of its divisors is an integer number (814512228).

Almost surely, 2^13994117840 is an apocalyptic number.

13994117840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13994117840 is an abundant number, since it is smaller than the sum of its proper divisors (18586371280).

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

13994117840 is a wasteful number, since it uses less digits than its factorization.

13994117840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237459 (or 237453 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 13994117840 in words is "thirteen billion, nine hundred ninety-four million, one hundred seventeen thousand, eight hundred forty".