11638975 has 12 divisors (see below), whose sum is σ = 14597280. Its totient is φ = 9204800.

The previous prime is 11638973. The next prime is 11638993. The reversal of 11638975 is 57983611.

It is not a de Polignac number, because 11638975 - 2¹ = 11638973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11638973) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 391 + ... + 4840.

It is an arithmetic number, because the mean of its divisors is an integer number (1216440).

Almost surely, 2^11638975 is an apocalyptic number.

11638975 is a deficient number, since it is larger than the sum of its proper divisors (2958305).

11638975 is an equidigital number, since it uses as much as digits as its factorization.

11638975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5330 (or 5325 counting only the distinct ones).

The product of its digits is 45360, while the sum is 40.

The square root of 11638975 is about 3411.5942021290. The cubic root of 11638975 is about 226.6234839402.

The spelling of 11638975 in words is "eleven million, six hundred thirty-eight thousand, nine hundred seventy-five".