11671840 has 24 divisors (see below), whose sum is σ = 27575100. Its totient is φ = 4668672.

The previous prime is 11671837. The next prime is 11671853. The reversal of 11671840 is 4817611.

It can be written as a sum of positive squares in 2 ways, for example, as 10679824 + 992016 = 3268^2 + 996^2 .

It is a junction number, because it is equal to n+sod(n) for n = 11671799 and 11671808.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36315 + ... + 36634.

Almost surely, 2^11671840 is an apocalyptic number.

11671840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11671840 is an abundant number, since it is smaller than the sum of its proper divisors (15903260).

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

11671840 is an equidigital number, since it uses as much as digits as its factorization.

11671840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72964 (or 72956 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 11671840 is about 3416.4074698431. The cubic root of 11671840 is about 226.8365892317.

The spelling of 11671840 in words is "eleven million, six hundred seventy-one thousand, eight hundred forty".