11291838 has 16 divisors (see below), whose sum is σ = 22617360. Its totient is φ = 3758336.

The previous prime is 11291831. The next prime is 11291849. The reversal of 11291838 is 83819211.

It is a junction number, because it is equal to n+sod(n) for n = 11291799 and 11291808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11291831) 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 7 ways as a sum of consecutive naturals, for example, 5806 + ... + 7502.

It is an arithmetic number, because the mean of its divisors is an integer number (1413585).

Almost surely, 2^11291838 is an apocalyptic number.

11291838 is an abundant number, since it is smaller than the sum of its proper divisors (11325522).

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

11291838 is a wasteful number, since it uses less digits than its factorization.

11291838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2811.

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

The square root of 11291838 is about 3360.3330192110. Note that the first 3 decimals coincide. The cubic root of 11291838 is about 224.3476611295.

The spelling of 11291838 in words is "eleven million, two hundred ninety-one thousand, eight hundred thirty-eight".