11609720 has 16 divisors (see below), whose sum is σ = 26121960. Its totient is φ = 4643872.

The previous prime is 11609711. The next prime is 11609723. The reversal of 11609720 is 2790611.

It is a self number, because there is not a number n which added to its sum of digits gives 11609720.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11609723) 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 3 ways as a sum of consecutive naturals, for example, 145082 + ... + 145161.

Almost surely, 2^11609720 is an apocalyptic number.

11609720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11609720 is an abundant number, since it is smaller than the sum of its proper divisors (14512240).

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

11609720 is a wasteful number, since it uses less digits than its factorization.

11609720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 290254 (or 290250 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 11609720 is about 3407.3039195235. The cubic root of 11609720 is about 226.4334490903.

The spelling of 11609720 in words is "eleven million, six hundred nine thousand, seven hundred twenty".