13689240 has 32 divisors (see below), whose sum is σ = 41068080. Its totient is φ = 3650432.

The previous prime is 13689227. The next prime is 13689241. The reversal of 13689240 is 4298631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13689241) 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, 56919 + ... + 57158.

Almost surely, 2^13689240 is an apocalyptic number.

13689240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13689240 is an abundant number, since it is smaller than the sum of its proper divisors (27378840).

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

13689240 is a wasteful number, since it uses less digits than its factorization.

13689240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114091 (or 114087 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 13689240 is about 3699.8972958719. The cubic root of 13689240 is about 239.2175909778.

The spelling of 13689240 in words is "thirteen million, six hundred eighty-nine thousand, two hundred forty".