13860440 has 96 divisors (see below), whose sum is σ = 36471600. Its totient is φ = 4700160.

The previous prime is 13860391. The next prime is 13860449. The reversal of 13860440 is 4406831.

It is a super-2 number, since 2×13860440² = 384223593987200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13860449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127106 + ... + 127214.

Almost surely, 2^13860440 is an apocalyptic number.

13860440 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 13860440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (18235800).

13860440 is an abundant number, since it is smaller than the sum of its proper divisors (22611160).

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

13860440 is a wasteful number, since it uses less digits than its factorization.

13860440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 165 (or 144 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 13860440 is about 3722.9611870123. The cubic root of 13860440 is about 240.2106946079.

The spelling of 13860440 in words is "thirteen million, eight hundred sixty thousand, four hundred forty".