18441648 has 40 divisors (see below), whose sum is σ = 52935600. Its totient is φ = 6147072.

The previous prime is 18441641. The next prime is 18441659. The reversal of 18441648 is 84614481.

18441648 is a `hidden beast` number, since 1 + 8 + 4 + 4 + 1 + 648 = 666.

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

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 (18441641) 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, 20913 + ... + 21776.

It is an arithmetic number, because the mean of its divisors is an integer number (1323390).

Almost surely, 2^18441648 is an apocalyptic number.

18441648 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

18441648 is an abundant number, since it is smaller than the sum of its proper divisors (34493952).

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

18441648 is a wasteful number, since it uses less digits than its factorization.

18441648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42706 (or 42694 counting only the distinct ones).

The product of its digits is 24576, while the sum is 36.

The square root of 18441648 is about 4294.3739939600. The cubic root of 18441648 is about 264.2002612734.

The spelling of 18441648 in words is "eighteen million, four hundred forty-one thousand, six hundred forty-eight".