13240040 has 32 divisors (see below), whose sum is σ = 32499360. Its totient is φ = 4814400.

The previous prime is 13240021. The next prime is 13240049. The reversal of 13240040 is 4004231.

It is a junction number, because it is equal to n+sod(n) for n = 13239997 and 13240024.

It is not an unprimeable number, because it can be changed into a prime (13240049) 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, 14606 + ... + 15485.

It is an arithmetic number, because the mean of its divisors is an integer number (1015605).

Almost surely, 2^13240040 is an apocalyptic number.

13240040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13240040 is an abundant number, since it is smaller than the sum of its proper divisors (19259320).

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

13240040 is a wasteful number, since it uses less digits than its factorization.

13240040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30113 (or 30109 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 13240040 is about 3638.6865762250. The cubic root of 13240040 is about 236.5718679597.

Adding to 13240040 its reverse (4004231), we get a palindrome (17244271).

The spelling of 13240040 in words is "thirteen million, two hundred forty thousand, forty".