13985505840 has 40 divisors (see below), whose sum is σ = 43355068848. Its totient is φ = 3729468160.

The previous prime is 13985505817. The next prime is 13985505847. The reversal of 13985505840 is 4850558931.

It is a happy number.

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

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 13985505840.

It is not an unprimeable number, because it can be changed into a prime (13985505847) 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, 29136231 + ... + 29136710.

Almost surely, 2^13985505840 is an apocalyptic number.

13985505840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13985505840 is an abundant number, since it is smaller than the sum of its proper divisors (29369563008).

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

13985505840 is a wasteful number, since it uses less digits than its factorization.

13985505840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58272957 (or 58272951 counting only the distinct ones).

The product of its (nonzero) digits is 864000, while the sum is 48.

The spelling of 13985505840 in words is "thirteen billion, nine hundred eighty-five million, five hundred five thousand, eight hundred forty".