11661090 has 32 divisors (see below), whose sum is σ = 31985280. Its totient is φ = 2665344.

The previous prime is 11661073. The next prime is 11661101. The reversal of 11661090 is 9016611.

It is a self number, because there is not a number n which added to its sum of digits gives 11661090.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27555 + ... + 27974.

It is an arithmetic number, because the mean of its divisors is an integer number (999540).

Almost surely, 2^11661090 is an apocalyptic number.

11661090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11661090 is an abundant number, since it is smaller than the sum of its proper divisors (20324190).

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

11661090 is a wasteful number, since it uses less digits than its factorization.

11661090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55546.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 11661090 is about 3414.8338173328. The cubic root of 11661090 is about 226.7669274831.

The spelling of 11661090 in words is "eleven million, six hundred sixty-one thousand, ninety".