11816840 has 48 divisors (see below), whose sum is σ = 30933900. Its totient is φ = 4050816.

The previous prime is 11816839. The next prime is 11816843. The reversal of 11816840 is 4861811.

It can be written as a sum of positive squares in 2 ways, for example, as 11383876 + 432964 = 3374^2 + 658^2 .

It is not an unprimeable number, because it can be changed into a prime (11816843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1055 + ... + 4974.

Almost surely, 2^11816840 is an apocalyptic number.

11816840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11816840 is an abundant number, since it is smaller than the sum of its proper divisors (19117060).

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

11816840 is a wasteful number, since it uses less digits than its factorization.

11816840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6054 (or 6043 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 29.

The square root of 11816840 is about 3437.5630903301. The cubic root of 11816840 is about 227.7720611075.

The spelling of 11816840 in words is "eleven million, eight hundred sixteen thousand, eight hundred forty".