11091940 has 12 divisors (see below), whose sum is σ = 23293116. Its totient is φ = 4436768.

The previous prime is 11091929. The next prime is 11091947. The reversal of 11091940 is 4919011.

It can be written as a sum of positive squares in 2 ways, for example, as 6190144 + 4901796 = 2488^2 + 2214^2 .

It is a super-2 number, since 2×11091940² = 246062265927200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11091947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 277279 + ... + 277318.

It is an arithmetic number, because the mean of its divisors is an integer number (1941093).

Almost surely, 2^11091940 is an apocalyptic number.

11091940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11091940 is an abundant number, since it is smaller than the sum of its proper divisors (12201176).

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

11091940 is a wasteful number, since it uses less digits than its factorization.

11091940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554606 (or 554604 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 25.

The square root of 11091940 is about 3330.4564251766. The cubic root of 11091940 is about 223.0159050772.

The spelling of 11091940 in words is "eleven million, ninety-one thousand, nine hundred forty".