1918244 has 6 divisors (see below), whose sum is σ = 3356934. Its totient is φ = 959120.

The previous prime is 1918243. The next prime is 1918247. The reversal of 1918244 is 4428191.

It can be written as a sum of positive squares in only one way, i.e., 1849600 + 68644 = 1360^2 + 262^2 .

It is not an unprimeable number, because it can be changed into a prime (1918243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 239777 + ... + 239784.

It is an arithmetic number, because the mean of its divisors is an integer number (559489).

2^1918244 is an apocalyptic number.

It is an amenable number.

1918244 is a deficient number, since it is larger than the sum of its proper divisors (1438690).

1918244 is a wasteful number, since it uses less digits than its factorization.

1918244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479565 (or 479563 counting only the distinct ones).

The product of its digits is 2304, while the sum is 29.

The square root of 1918244 is about 1385.0068591888. The cubic root of 1918244 is about 124.2513977066.

The spelling of 1918244 in words is "one million, nine hundred eighteen thousand, two hundred forty-four".