13707840 has 112 divisors (see below), whose sum is σ = 44256960. Its totient is φ = 3594240.

The previous prime is 13707829. The next prime is 13707847. The reversal of 13707840 is 4870731.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 13707798 and 13707807.

It is not an unprimeable number, because it can be changed into a prime (13707847) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104575 + ... + 104705.

Almost surely, 2^13707840 is an apocalyptic number.

13707840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13707840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22128480).

13707840 is an abundant number, since it is smaller than the sum of its proper divisors (30549120).

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

13707840 is a wasteful number, since it uses less digits than its factorization.

13707840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 30.

The square root of 13707840 is about 3702.4100259156. The cubic root of 13707840 is about 239.3258860941.

The spelling of 13707840 in words is "thirteen million, seven hundred seven thousand, eight hundred forty".