11722818 has 8 divisors (see below), whose sum is σ = 23445648. Its totient is φ = 3907604.

The previous prime is 11722817. The next prime is 11722819. The reversal of 11722818 is 81822711.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11722817) and next prime (11722819).

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

11722818 is an admirable number.

It is a super-2 number, since 2×11722818² = 274848923722248, which contains 22 as substring.

It is a zygodrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (11722811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 976896 + ... + 976907.

It is an arithmetic number, because the mean of its divisors is an integer number (2930706).

Almost surely, 2^11722818 is an apocalyptic number.

11722818 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.

11722818 is a wasteful number, since it uses less digits than its factorization.

11722818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1953808.

The product of its digits is 1792, while the sum is 30.

The square root of 11722818 is about 3423.8601022822. The cubic root of 11722818 is about 227.1663538956.

The spelling of 11722818 in words is "eleven million, seven hundred twenty-two thousand, eight hundred eighteen".