2223918 has 12 divisors (see below), whose sum is σ = 4818528. Its totient is φ = 741300.

The previous prime is 2223911. The next prime is 2223937. The reversal of 2223918 is 8193222.

It is a happy number.

It is a super-2 number, since 2×2223918² = 9891622541448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2223891 and 2223900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2223911) 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 5 ways as a sum of consecutive naturals, for example, 61758 + ... + 61793.

It is an arithmetic number, because the mean of its divisors is an integer number (401544).

2^2223918 is an apocalyptic number.

2223918 is an abundant number, since it is smaller than the sum of its proper divisors (2594610).

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

2223918 is a wasteful number, since it uses less digits than its factorization.

2223918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123559 (or 123556 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 2223918 is about 1491.2806576899. The cubic root of 2223918 is about 130.5287733269.

The spelling of 2223918 in words is "two million, two hundred twenty-three thousand, nine hundred eighteen".