11890836 has 36 divisors (see below), whose sum is σ = 30162132. Its totient is φ = 3949824.

The previous prime is 11890807. The next prime is 11890873. The reversal of 11890836 is 63809811.

It can be written as a sum of positive squares in 2 ways, for example, as 3802500 + 8088336 = 1950^2 + 2844^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 11890836.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 19756 + ... + 20348.

It is an arithmetic number, because the mean of its divisors is an integer number (837837).

Almost surely, 2^11890836 is an apocalyptic number.

It is an amenable number.

11890836 is an abundant number, since it is smaller than the sum of its proper divisors (18271296).

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

11890836 is a wasteful number, since it uses less digits than its factorization.

11890836 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1160 (or 1155 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 11890836 is about 3448.3091508738. The cubic root of 11890836 is about 228.2465016357.

The spelling of 11890836 in words is "eleven million, eight hundred ninety thousand, eight hundred thirty-six".