11723520 has 144 divisors (see below), whose sum is σ = 38852352. Its totient is φ = 3010560.

The previous prime is 11723519. The next prime is 11723527. The reversal of 11723520 is 2532711.

It is not an unprimeable number, because it can be changed into a prime (11723527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165085 + ... + 165155.

It is an arithmetic number, because the mean of its divisors is an integer number (269808).

Almost surely, 2^11723520 is an apocalyptic number.

11723520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11723520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19426176).

11723520 is an abundant number, since it is smaller than the sum of its proper divisors (27128832).

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

11723520 is an equidigital number, since it uses as much as digits as its factorization.

11723520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 420, while the sum is 21.

The square root of 11723520 is about 3423.9626166184. The cubic root of 11723520 is about 227.1708882888.

The spelling of 11723520 in words is "eleven million, seven hundred twenty-three thousand, five hundred twenty".