11213988 has 12 divisors (see below), whose sum is σ = 26166000. Its totient is φ = 3737992.

The previous prime is 11213987. The next prime is 11214023. The reversal of 11213988 is 88931211.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (11213987) by changing a digit.

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, 467238 + ... + 467261.

It is an arithmetic number, because the mean of its divisors is an integer number (2180500).

Almost surely, 2^11213988 is an apocalyptic number.

It is an amenable number.

11213988 is an abundant number, since it is smaller than the sum of its proper divisors (14952012).

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

11213988 is a wasteful number, since it uses less digits than its factorization.

11213988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 934506 (or 934504 counting only the distinct ones).

The product of its digits is 3456, while the sum is 33.

The square root of 11213988 is about 3348.7293112463. The cubic root of 11213988 is about 223.8308938385.

The spelling of 11213988 in words is "eleven million, two hundred thirteen thousand, nine hundred eighty-eight".