11723140 has 48 divisors (see below), whose sum is σ = 28929600. Its totient is φ = 3934080.

The previous prime is 11723137. The next prime is 11723141. The reversal of 11723140 is 4132711.

It is a super-2 number, since 2×11723140² = 274864022919200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11723141) 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, 811 + ... + 4909.

It is an arithmetic number, because the mean of its divisors is an integer number (602700).

Almost surely, 2^11723140 is an apocalyptic number.

11723140 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 11723140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14464800).

11723140 is an abundant number, since it is smaller than the sum of its proper divisors (17206460).

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

11723140 is a wasteful number, since it uses less digits than its factorization.

11723140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4132 (or 4130 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 19.

The square root of 11723140 is about 3423.9071249086. The cubic root of 11723140 is about 227.1684337964.

Adding to 11723140 its reverse (4132711), we get a palindrome (15855851).

The spelling of 11723140 in words is "eleven million, seven hundred twenty-three thousand, one hundred forty".