18840648 has 48 divisors (see below), whose sum is σ = 48381840. Its totient is φ = 6113920.

The previous prime is 18840637. The next prime is 18840671. The reversal of 18840648 is 84604881.

It is a super-3 number, since 3×18840648³ (a number of 23 digits) contains 333 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40111 + ... + 40577.

It is an arithmetic number, because the mean of its divisors is an integer number (1007955).

Almost surely, 2^18840648 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18840648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24190920).

18840648 is an abundant number, since it is smaller than the sum of its proper divisors (29541192).

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

18840648 is a wasteful number, since it uses less digits than its factorization.

18840648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 558 (or 513 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 39.

The square root of 18840648 is about 4340.5815278601. The cubic root of 18840648 is about 266.0920780969.

The spelling of 18840648 in words is "eighteen million, eight hundred forty thousand, six hundred forty-eight".