13807240 has 16 divisors (see below), whose sum is σ = 31066380. Its totient is φ = 5522880.

The previous prime is 13807231. The next prime is 13807249. The reversal of 13807240 is 4270831.

It is an interprime number because it is at equal distance from previous prime (13807231) and next prime (13807249).

It can be written as a sum of positive squares in 2 ways, for example, as 13645636 + 161604 = 3694^2 + 402^2 .

It is not an unprimeable number, because it can be changed into a prime (13807249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172551 + ... + 172630.

Almost surely, 2^13807240 is an apocalyptic number.

13807240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13807240 is an abundant number, since it is smaller than the sum of its proper divisors (17259140).

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

13807240 is a wasteful number, since it uses less digits than its factorization.

13807240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 345192 (or 345188 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 13807240 is about 3715.8094676665. The cubic root of 13807240 is about 239.9029700362.

The spelling of 13807240 in words is "thirteen million, eight hundred seven thousand, two hundred forty".