11572720 has 20 divisors (see below), whose sum is σ = 26906760. Its totient is φ = 4629056.

The previous prime is 11572679. The next prime is 11572721. The reversal of 11572720 is 2727511.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11572721) 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, 72250 + ... + 72409.

It is an arithmetic number, because the mean of its divisors is an integer number (1345338).

Almost surely, 2^11572720 is an apocalyptic number.

11572720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11572720 is an abundant number, since it is smaller than the sum of its proper divisors (15334040).

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

11572720 is a wasteful number, since it uses less digits than its factorization.

11572720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144672 (or 144666 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 11572720 is about 3401.8700739446. The cubic root of 11572720 is about 226.1926464515.

The spelling of 11572720 in words is "eleven million, five hundred seventy-two thousand, seven hundred twenty".