18240480 has 144 divisors (see below), whose sum is σ = 63685440. Its totient is φ = 4752384.

The previous prime is 18240479. The next prime is 18240511. The reversal of 18240480 is 8404281.

18240480 is a `hidden beast` number, since 182 + 4 + 0 + 480 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×18240480² = 665430221260800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 76201 + ... + 76439.

It is an arithmetic number, because the mean of its divisors is an integer number (442260).

Almost surely, 2^18240480 is an apocalyptic number.

18240480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18240480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31842720).

18240480 is an abundant number, since it is smaller than the sum of its proper divisors (45444960).

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

18240480 is a wasteful number, since it uses less digits than its factorization.

18240480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 302 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 18240480 is about 4270.8874955915. The cubic root of 18240480 is about 263.2360836576.

The spelling of 18240480 in words is "eighteen million, two hundred forty thousand, four hundred eighty".