11471940 has 144 divisors (see below), whose sum is σ = 38683008. Its totient is φ = 2737152.

The previous prime is 11471939. The next prime is 11471947. The reversal of 11471940 is 4917411.

It is not an unprimeable number, because it can be changed into a prime (11471947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 70299 + ... + 70461.

It is an arithmetic number, because the mean of its divisors is an integer number (268632).

Almost surely, 2^11471940 is an apocalyptic number.

11471940 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 11471940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19341504).

11471940 is an abundant number, since it is smaller than the sum of its proper divisors (27211068).

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

11471940 is a wasteful number, since it uses less digits than its factorization.

11471940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218 (or 213 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 11471940 is about 3387.0252434843. The cubic root of 11471940 is about 225.5341383870.

The spelling of 11471940 in words is "eleven million, four hundred seventy-one thousand, nine hundred forty".