11643436 has 48 divisors (see below), whose sum is σ = 25123392. Its totient is φ = 4608000.

The previous prime is 11643431. The next prime is 11643449. The reversal of 11643436 is 63434611.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (11643431) 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 15 ways as a sum of consecutive naturals, for example, 28836 + ... + 29236.

It is an arithmetic number, because the mean of its divisors is an integer number (523404).

Almost surely, 2^11643436 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 11643436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12561696).

11643436 is an abundant number, since it is smaller than the sum of its proper divisors (13479956).

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

11643436 is a wasteful number, since it uses less digits than its factorization.

11643436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490 (or 488 counting only the distinct ones).

The product of its digits is 5184, while the sum is 28.

The square root of 11643436 is about 3412.2479394089. The cubic root of 11643436 is about 226.6524337468.

The spelling of 11643436 in words is "eleven million, six hundred forty-three thousand, four hundred thirty-six".