11639012 has 96 divisors (see below), whose sum is σ = 27869184. Its totient is φ = 4118400.

The previous prime is 11639011. The next prime is 11639021. The reversal of 11639012 is 21093611.

It is a happy number.

It is a super-2 number, since 2×11639012² = 270933200672288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11639011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 219578 + ... + 219630.

It is an arithmetic number, because the mean of its divisors is an integer number (290304).

Almost surely, 2^11639012 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11639012, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13934592).

11639012 is an abundant number, since it is smaller than the sum of its proper divisors (16230172).

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

11639012 is a wasteful number, since it uses less digits than its factorization.

11639012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 11639012 is about 3411.5996248095. The cubic root of 11639012 is about 226.6237240833.

The spelling of 11639012 in words is "eleven million, six hundred thirty-nine thousand, twelve".