18885240 has 192 divisors, whose sum is σ = 70761600. Its totient is φ = 4320000.

The previous prime is 18885233. The next prime is 18885253. The reversal of 18885240 is 4258881.

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

It is a junction number, because it is equal to n+sod(n) for n = 18885195 and 18885204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 75115 + ... + 75365.

It is an arithmetic number, because the mean of its divisors is an integer number (368550).

Almost surely, 2^18885240 is an apocalyptic number.

18885240 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 18885240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35380800).

18885240 is an abundant number, since it is smaller than the sum of its proper divisors (51876360).

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

18885240 is a wasteful number, since it uses less digits than its factorization.

18885240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 291 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 18885240 is about 4345.7151310227. The cubic root of 18885240 is about 266.3018413898.

The spelling of 18885240 in words is "eighteen million, eight hundred eighty-five thousand, two hundred forty".