18442128 has 40 divisors (see below), whose sum is σ = 48809376. Its totient is φ = 5996800.

The previous prime is 18442121. The next prime is 18442129. The reversal of 18442128 is 82124481.

It is a super-2 number, since 2×18442128² = 680224170336768, which contains 22 as substring.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

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

It is a junction number, because it is equal to n+sod(n) for n = 18442095 and 18442104.

It is not an unprimeable number, because it can be changed into a prime (18442121) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 2718 + ... + 6653.

Almost surely, 2^18442128 is an apocalyptic number.

It is an amenable number.

18442128 is an abundant number, since it is smaller than the sum of its proper divisors (30367248).

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

18442128 is a wasteful number, since it uses less digits than its factorization.

18442128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9423 (or 9417 counting only the distinct ones).

The product of its digits is 4096, while the sum is 30.

The square root of 18442128 is about 4294.4298806710. The cubic root of 18442128 is about 264.2025534588.

The spelling of 18442128 in words is "eighteen million, four hundred forty-two thousand, one hundred twenty-eight".