18442888 has 8 divisors (see below), whose sum is σ = 34580430. Its totient is φ = 9221440.

The previous prime is 18442883. The next prime is 18442891. The reversal of 18442888 is 88824481.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16305444 + 2137444 = 4038^2 + 1462^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (18442883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1152673 + ... + 1152688.

Almost surely, 2^18442888 is an apocalyptic number.

It is an amenable number.

18442888 is a deficient number, since it is larger than the sum of its proper divisors (16137542).

18442888 is a wasteful number, since it uses less digits than its factorization.

18442888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2305367 (or 2305363 counting only the distinct ones).

The product of its digits is 131072, while the sum is 43.

The square root of 18442888 is about 4294.5183664760. The cubic root of 18442888 is about 264.2061826709.

The spelling of 18442888 in words is "eighteen million, four hundred forty-two thousand, eight hundred eighty-eight".