11671812 has 18 divisors (see below), whose sum is σ = 29503838. Its totient is φ = 3890592.

The previous prime is 11671799. The next prime is 11671817. The reversal of 11671812 is 21817611.

It can be written as a sum of positive squares in only one way, i.e., 7485696 + 4186116 = 2736^2 + 2046^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is not an unprimeable number, because it can be changed into a prime (11671817) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 162073 + ... + 162144.

Almost surely, 2^11671812 is an apocalyptic number.

11671812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

11671812 is an abundant number, since it is smaller than the sum of its proper divisors (17832026).

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

11671812 is a wasteful number, since it uses less digits than its factorization.

11671812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324227 (or 324222 counting only the distinct ones).

The product of its digits is 672, while the sum is 27.

The square root of 11671812 is about 3416.4033719688. The cubic root of 11671812 is about 226.8364078428.

The spelling of 11671812 in words is "eleven million, six hundred seventy-one thousand, eight hundred twelve".