11724140 has 24 divisors (see below), whose sum is σ = 25917360. Its totient is φ = 4442688.

The previous prime is 11724133. The next prime is 11724173. The reversal of 11724140 is 4142711.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15047 + ... + 15806.

It is an arithmetic number, because the mean of its divisors is an integer number (1079890).

Almost surely, 2^11724140 is an apocalyptic number.

11724140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11724140 is an abundant number, since it is smaller than the sum of its proper divisors (14193220).

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

11724140 is a wasteful number, since it uses less digits than its factorization.

11724140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30881 (or 30879 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 11724140 is about 3424.0531537930. The cubic root of 11724140 is about 227.1748928730.

Adding to 11724140 its reverse (4142711), we get a palindrome (15866851).

The spelling of 11724140 in words is "eleven million, seven hundred twenty-four thousand, one hundred forty".