13945988440 has 32 divisors (see below), whose sum is σ = 31417238160. Its totient is φ = 5571504000.

The previous prime is 13945988423. The next prime is 13945988479. The reversal of 13945988440 is 4488954931.

It is a super-2 number, since 2×13945988440² (a number of 21 digits) contains 22 as substring.

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, 182511 + ... + 247390.

Almost surely, 2^13945988440 is an apocalyptic number.

13945988440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13945988440 is an abundant number, since it is smaller than the sum of its proper divisors (17471249720).

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

13945988440 is a wasteful number, since it uses less digits than its factorization.

13945988440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430723 (or 430719 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 55.

The spelling of 13945988440 in words is "thirteen billion, nine hundred forty-five million, nine hundred eighty-eight thousand, four hundred forty".