18269244 has 36 divisors (see below), whose sum is σ = 52778544. Its totient is φ = 5219712.

The previous prime is 18269233. The next prime is 18269267. The reversal of 18269244 is 44296281.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 18269199 and 18269208.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35997 + ... + 36500.

Almost surely, 2^18269244 is an apocalyptic number.

18269244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

18269244 is an abundant number, since it is smaller than the sum of its proper divisors (34509300).

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

18269244 is a wasteful number, since it uses less digits than its factorization.

18269244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72514 (or 72509 counting only the distinct ones).

The product of its digits is 27648, while the sum is 36.

The square root of 18269244 is about 4274.2536190544. The cubic root of 18269244 is about 263.3743794730.

The spelling of 18269244 in words is "eighteen million, two hundred sixty-nine thousand, two hundred forty-four".