16918240 has 48 divisors (see below), whose sum is σ = 40960080. Its totient is φ = 6599680.

The previous prime is 16918229. The next prime is 16918243. The reversal of 16918240 is 4281961.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16918243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5271 + ... + 7849.

It is an arithmetic number, because the mean of its divisors is an integer number (853335).

Almost surely, 2^16918240 is an apocalyptic number.

16918240 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 16918240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20480040).

16918240 is an abundant number, since it is smaller than the sum of its proper divisors (24041840).

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

16918240 is a wasteful number, since it uses less digits than its factorization.

16918240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2635 (or 2627 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 16918240 is about 4113.1788193561. The cubic root of 16918240 is about 256.7152847314.

The spelling of 16918240 in words is "sixteen million, nine hundred eighteen thousand, two hundred forty".