18444286 has 24 divisors (see below), whose sum is σ = 34079616. Its totient is φ = 7439040.

The previous prime is 18444281. The next prime is 18444289. The reversal of 18444286 is 68244481.

18444286 = 204² + 205² + ... + 399².

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18444281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3870 + ... + 7201.

It is an arithmetic number, because the mean of its divisors is an integer number (1419984).

Almost surely, 2^18444286 is an apocalyptic number.

18444286 is a deficient number, since it is larger than the sum of its proper divisors (15635330).

18444286 is a wasteful number, since it uses less digits than its factorization.

18444286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11104 (or 11097 counting only the distinct ones).

The product of its digits is 49152, while the sum is 37.

The square root of 18444286 is about 4294.6811290246. The cubic root of 18444286 is about 264.2128582507.

It can be divided in two parts, 184442 and 86, that added together give a triangular number (184528 = T₆₀₇).

The spelling of 18444286 in words is "eighteen million, four hundred forty-four thousand, two hundred eighty-six".