11911940 has 24 divisors (see below), whose sum is σ = 25267032. Its totient is φ = 4716800.

The previous prime is 11911931. The next prime is 11911969. The reversal of 11911940 is 4911911.

11911940 = T₁₁ + T₁₂ + ... + T₄₁₄.

It can be written as a sum of positive squares in 4 ways, for example, as 6885376 + 5026564 = 2624^2 + 2242^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 929 + ... + 4968.

It is an arithmetic number, because the mean of its divisors is an integer number (1052793).

Almost surely, 2^11911940 is an apocalyptic number.

11911940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11911940 is an abundant number, since it is smaller than the sum of its proper divisors (13355092).

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

11911940 is a wasteful number, since it uses less digits than its factorization.

11911940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6007 (or 6005 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 26.

The square root of 11911940 is about 3451.3678447827. The cubic root of 11911940 is about 228.3814533826.

The spelling of 11911940 in words is "eleven million, nine hundred eleven thousand, nine hundred forty".