11639968 has 24 divisors (see below), whose sum is σ = 24265332. Its totient is φ = 5477376.

The previous prime is 11639963. The next prime is 11639987. The reversal of 11639968 is 86993611.

It can be written as a sum of positive squares in 2 ways, for example, as 9168784 + 2471184 = 3028^2 + 1572^2 .

It is not an unprimeable number, because it can be changed into a prime (11639963) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10155 + ... + 11242.

Almost surely, 2^11639968 is an apocalyptic number.

It is an amenable number.

11639968 is an abundant number, since it is smaller than the sum of its proper divisors (12625364).

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

11639968 is a wasteful number, since it uses less digits than its factorization.

11639968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21424 (or 21416 counting only the distinct ones).

The product of its digits is 69984, while the sum is 43.

The square root of 11639968 is about 3411.7397321601. The cubic root of 11639968 is about 226.6299286864.

The spelling of 11639968 in words is "eleven million, six hundred thirty-nine thousand, nine hundred sixty-eight".