11131990 has 8 divisors (see below), whose sum is σ = 20037600. Its totient is φ = 4452792.

The previous prime is 11131979. The next prime is 11131999. The reversal of 11131990 is 9913111.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11131999) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 556590 + ... + 556609.

It is an arithmetic number, because the mean of its divisors is an integer number (2504700).

Almost surely, 2^11131990 is an apocalyptic number.

11131990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11131990 is a deficient number, since it is larger than the sum of its proper divisors (8905610).

11131990 is a wasteful number, since it uses less digits than its factorization.

11131990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1113206.

The product of its (nonzero) digits is 243, while the sum is 25.

The square root of 11131990 is about 3336.4636967904. The cubic root of 11131990 is about 223.2839993998.

It can be divided in two parts, 11131 and 990, that added together give a palindrome (12121).

The spelling of 11131990 in words is "eleven million, one hundred thirty-one thousand, nine hundred ninety".