11781834 has 8 divisors (see below), whose sum is σ = 23563680. Its totient is φ = 3927276.

The previous prime is 11781827. The next prime is 11781839. The reversal of 11781834 is 43818711.

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

11781834 is an admirable number.

It is a super-2 number, since 2×11781834² = 277623224807112, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11781795 and 11781804.

It is not an unprimeable number, because it can be changed into a prime (11781839) 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, 981814 + ... + 981825.

It is an arithmetic number, because the mean of its divisors is an integer number (2945460).

Almost surely, 2^11781834 is an apocalyptic number.

11781834 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

11781834 is a wasteful number, since it uses less digits than its factorization.

11781834 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1963644.

The product of its digits is 5376, while the sum is 33.

The square root of 11781834 is about 3432.4676254846. The cubic root of 11781834 is about 227.5469226564.

The spelling of 11781834 in words is "eleven million, seven hundred eighty-one thousand, eight hundred thirty-four".