18908244 has 36 divisors (see below), whose sum is σ = 47945716. Its totient is φ = 6283008.

The previous prime is 18908243. The next prime is 18908269. The reversal of 18908244 is 44280981.

It can be written as a sum of positive squares in 2 ways, for example, as 1368900 + 17539344 = 1170^2 + 4188^2 .

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 = 18908199 and 18908208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18908243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14982 + ... + 16194.

Almost surely, 2^18908244 is an apocalyptic number.

It is an amenable number.

18908244 is an abundant number, since it is smaller than the sum of its proper divisors (29037472).

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

18908244 is a wasteful number, since it uses less digits than its factorization.

18908244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1656 (or 1651 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 18908244 is about 4348.3610705644. The cubic root of 18908244 is about 266.4099244199.

The spelling of 18908244 in words is "eighteen million, nine hundred eight thousand, two hundred forty-four".