11722540 has 24 divisors (see below), whose sum is σ = 25084080. Its totient is φ = 4600128.

The previous prime is 11722519. The next prime is 11722589. The reversal of 11722540 is 4522711.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4470 + ... + 6589.

It is an arithmetic number, because the mean of its divisors is an integer number (1045170).

Almost surely, 2^11722540 is an apocalyptic number.

11722540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11722540 is an abundant number, since it is smaller than the sum of its proper divisors (13361540).

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

11722540 is a wasteful number, since it uses less digits than its factorization.

11722540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11121 (or 11119 counting only the distinct ones).

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 11722540 is about 3423.8195045884. The cubic root of 11722540 is about 227.1645581742.

The spelling of 11722540 in words is "eleven million, seven hundred twenty-two thousand, five hundred forty".