11640239 has 8 divisors (see below), whose sum is σ = 12571440. Its totient is φ = 10714176.

The previous prime is 11640199. The next prime is 11640241. The reversal of 11640239 is 93204611.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11640239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11640539) 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, 4379 + ... + 6515.

It is an arithmetic number, because the mean of its divisors is an integer number (1571430).

Almost surely, 2^11640239 is an apocalyptic number.

11640239 is a deficient number, since it is larger than the sum of its proper divisors (931201).

11640239 is a wasteful number, since it uses less digits than its factorization.

11640239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2569.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 11640239 is about 3411.7794477369. The cubic root of 11640239 is about 226.6316874608.

The spelling of 11640239 in words is "eleven million, six hundred forty thousand, two hundred thirty-nine".