11291388 has 12 divisors (see below), whose sum is σ = 26346600. Its totient is φ = 3763792.

The previous prime is 11291381. The next prime is 11291393. The reversal of 11291388 is 88319211.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11291381) 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, 470463 + ... + 470486.

It is an arithmetic number, because the mean of its divisors is an integer number (2195550).

Almost surely, 2^11291388 is an apocalyptic number.

It is an amenable number.

11291388 is an abundant number, since it is smaller than the sum of its proper divisors (15055212).

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

11291388 is a wasteful number, since it uses less digits than its factorization.

11291388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940956 (or 940954 counting only the distinct ones).

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

The square root of 11291388 is about 3360.2660608946. The cubic root of 11291388 is about 224.3446808710.

The spelling of 11291388 in words is "eleven million, two hundred ninety-one thousand, three hundred eighty-eight".