11819890 has 32 divisors (see below), whose sum is σ = 22063104. Its totient is φ = 4556160.

The previous prime is 11819887. The next prime is 11819891. The reversal of 11819890 is 9891811.

It is a happy number.

It is a super-2 number, since 2×11819890² = 279419599224200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (11819891) 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 15 ways as a sum of consecutive naturals, for example, 51957 + ... + 52183.

It is an arithmetic number, because the mean of its divisors is an integer number (689472).

Almost surely, 2^11819890 is an apocalyptic number.

11819890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11819890 is a deficient number, since it is larger than the sum of its proper divisors (10243214).

11819890 is a wasteful number, since it uses less digits than its factorization.

11819890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402.

The product of its (nonzero) digits is 5184, while the sum is 37.

The square root of 11819890 is about 3438.0066899295. The cubic root of 11819890 is about 227.7916558843.

The spelling of 11819890 in words is "eleven million, eight hundred nineteen thousand, eight hundred ninety".