13807940 has 12 divisors (see below), whose sum is σ = 28996716. Its totient is φ = 5523168.

The previous prime is 13807909. The next prime is 13807949. The reversal of 13807940 is 4970831.

It can be written as a sum of positive squares in 2 ways, for example, as 1473796 + 12334144 = 1214^2 + 3512^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13807897 and 13807906.

It is not an unprimeable number, because it can be changed into a prime (13807949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345179 + ... + 345218.

It is an arithmetic number, because the mean of its divisors is an integer number (2416393).

Almost surely, 2^13807940 is an apocalyptic number.

13807940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13807940 is an abundant number, since it is smaller than the sum of its proper divisors (15188776).

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

13807940 is a wasteful number, since it uses less digits than its factorization.

13807940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690406 (or 690404 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 13807940 is about 3715.9036586004. The cubic root of 13807940 is about 239.9070241711.

The spelling of 13807940 in words is "thirteen million, eight hundred seven thousand, nine hundred forty".