13840287 has 8 divisors (see below), whose sum is σ = 18473136. Its totient is φ = 9217152.

The previous prime is 13840271. The next prime is 13840327. The reversal of 13840287 is 78204831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13840287 - 2⁴ = 13840271 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13840217) 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, 2113 + ... + 5669.

It is an arithmetic number, because the mean of its divisors is an integer number (2309142).

Almost surely, 2^13840287 is an apocalyptic number.

13840287 is a deficient number, since it is larger than the sum of its proper divisors (4632849).

13840287 is a wasteful number, since it uses less digits than its factorization.

13840287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4857.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 13840287 is about 3720.2536203867. The cubic root of 13840287 is about 240.0942164809.

The spelling of 13840287 in words is "thirteen million, eight hundred forty thousand, two hundred eighty-seven".