11801286 has 48 divisors (see below), whose sum is σ = 29421600. Its totient is φ = 3348864.

The previous prime is 11801269. The next prime is 11801287. The reversal of 11801286 is 68210811.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11801287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28650 + ... + 29058.

It is an arithmetic number, because the mean of its divisors is an integer number (612950).

Almost surely, 2^11801286 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11801286, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14710800).

11801286 is an abundant number, since it is smaller than the sum of its proper divisors (17620314).

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

11801286 is a wasteful number, since it uses less digits than its factorization.

11801286 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 653 (or 650 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 27.

The square root of 11801286 is about 3435.2999869007. The cubic root of 11801286 is about 227.6720816947.

The spelling of 11801286 in words is "eleven million, eight hundred one thousand, two hundred eighty-six".