11871890 has 8 divisors (see below), whose sum is σ = 21369420. Its totient is φ = 4748752.

The previous prime is 11871829. The next prime is 11871907. The reversal of 11871890 is 9817811.

It can be written as a sum of positive squares in 2 ways, for example, as 11689561 + 182329 = 3419^2 + 427^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 11871890.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593585 + ... + 593604.

Almost surely, 2^11871890 is an apocalyptic number.

11871890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11871890 is a deficient number, since it is larger than the sum of its proper divisors (9497530).

11871890 is a wasteful number, since it uses less digits than its factorization.

11871890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187196.

The product of its (nonzero) digits is 4032, while the sum is 35.

The square root of 11871890 is about 3445.5609122464. The cubic root of 11871890 is about 228.1252133607.

The spelling of 11871890 in words is "eleven million, eight hundred seventy-one thousand, eight hundred ninety".