11778238 has 4 divisors (see below), whose sum is σ = 17667360. Its totient is φ = 5889118.

The previous prime is 11778227. The next prime is 11778241. The reversal of 11778238 is 83287711.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 83287711 = 13 ⋅6406747.

It is a junction number, because it is equal to n+sod(n) for n = 11778197 and 11778206.

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, 2944558 + ... + 2944561.

It is an arithmetic number, because the mean of its divisors is an integer number (4416840).

Almost surely, 2^11778238 is an apocalyptic number.

11778238 is a deficient number, since it is larger than the sum of its proper divisors (5889122).

11778238 is an equidigital number, since it uses as much as digits as its factorization.

11778238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5889121.

The product of its digits is 18816, while the sum is 37.

The square root of 11778238 is about 3431.9437641080. The cubic root of 11778238 is about 227.5237700076.

The spelling of 11778238 in words is "eleven million, seven hundred seventy-eight thousand, two hundred thirty-eight".