11778838 has 4 divisors (see below), whose sum is σ = 17668260. Its totient is φ = 5889418.

The previous prime is 11778797. The next prime is 11778847. The reversal of 11778838 is 83887711.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 11778794 and 11778803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2944708 + ... + 2944711.

It is an arithmetic number, because the mean of its divisors is an integer number (4417065).

Almost surely, 2^11778838 is an apocalyptic number.

11778838 is a deficient number, since it is larger than the sum of its proper divisors (5889422).

11778838 is an equidigital number, since it uses as much as digits as its factorization.

11778838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5889421.

The product of its digits is 75264, while the sum is 43.

The square root of 11778838 is about 3432.0311770146. The cubic root of 11778838 is about 227.5276334022.

The spelling of 11778838 in words is "eleven million, seven hundred seventy-eight thousand, eight hundred thirty-eight".