11801140 has 24 divisors (see below), whose sum is σ = 26689320. Its totient is φ = 4357248.

The previous prime is 11801129. The next prime is 11801149. The reversal of 11801140 is 4110811.

It can be written as a sum of positive squares in 4 ways, for example, as 685584 + 11115556 = 828^2 + 3334^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11801149) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22435 + ... + 22954.

It is an arithmetic number, because the mean of its divisors is an integer number (1112055).

Almost surely, 2^11801140 is an apocalyptic number.

11801140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11801140 is an abundant number, since it is smaller than the sum of its proper divisors (14888180).

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

11801140 is a wasteful number, since it uses less digits than its factorization.

11801140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45411 (or 45409 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

The square root of 11801140 is about 3435.2787368713. The cubic root of 11801140 is about 227.6711428066.

Adding to 11801140 its reverse (4110811), we get a palindrome (15911951).

The spelling of 11801140 in words is "eleven million, eight hundred one thousand, one hundred forty".