11811090 has 32 divisors (see below), whose sum is σ = 30015360. Its totient is φ = 2964224.

The previous prime is 11811089. The next prime is 11811097. The reversal of 11811090 is 9011811.

It is not an unprimeable number, because it can be changed into a prime (11811097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11070 + ... + 12089.

It is an arithmetic number, because the mean of its divisors is an integer number (937980).

Almost surely, 2^11811090 is an apocalyptic number.

11811090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11811090 is an abundant number, since it is smaller than the sum of its proper divisors (18204270).

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

11811090 is a wasteful number, since it uses less digits than its factorization.

11811090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23186.

The product of its (nonzero) digits is 72, while the sum is 21.

The square root of 11811090 is about 3436.7266402785. The cubic root of 11811090 is about 227.7351109630.

The spelling of 11811090 in words is "eleven million, eight hundred eleven thousand, ninety".