11543720 has 32 divisors (see below), whose sum is σ = 26183520. Its totient is φ = 4580160.

The previous prime is 11543713. The next prime is 11543729. The reversal of 11543720 is 2734511.

It is a Smith number, since the sum of its digits (23) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11543729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4139 + ... + 6341.

It is an arithmetic number, because the mean of its divisors is an integer number (818235).

Almost surely, 2^11543720 is an apocalyptic number.

11543720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11543720 is an abundant number, since it is smaller than the sum of its proper divisors (14639800).

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

11543720 is a wasteful number, since it uses less digits than its factorization.

11543720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2345 (or 2341 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 23.

The square root of 11543720 is about 3397.6050388472. The cubic root of 11543720 is about 226.0035502092.

The spelling of 11543720 in words is "eleven million, five hundred forty-three thousand, seven hundred twenty".