18944238 has 8 divisors (see below), whose sum is σ = 37888488. Its totient is φ = 6314744.

The previous prime is 18944231. The next prime is 18944257. The reversal of 18944238 is 83244981.

It is a sphenic number, since it is the product of 3 distinct primes.

18944238 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 18944196 and 18944205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18944231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1578681 + ... + 1578692.

It is an arithmetic number, because the mean of its divisors is an integer number (4736061).

Almost surely, 2^18944238 is an apocalyptic number.

18944238 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

18944238 is a wasteful number, since it uses less digits than its factorization.

18944238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3157378.

The product of its digits is 55296, while the sum is 39.

The square root of 18944238 is about 4352.4979035032. The cubic root of 18944238 is about 266.5788644964.

It can be divided in two parts, 1894423 and 8, that added together give a triangular number (1894431 = T₁₉₄₆).

The spelling of 18944238 in words is "eighteen million, nine hundred forty-four thousand, two hundred thirty-eight".