16866240 has 56 divisors (see below), whose sum is σ = 53553360. Its totient is φ = 4497408.

The previous prime is 16866233. The next prime is 16866251. The reversal of 16866240 is 4266861.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7825 + ... + 9744.

It is an arithmetic number, because the mean of its divisors is an integer number (956310).

Almost surely, 2^16866240 is an apocalyptic number.

16866240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16866240 is an abundant number, since it is smaller than the sum of its proper divisors (36687120).

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

16866240 is a wasteful number, since it uses less digits than its factorization.

16866240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17589 (or 17579 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 16866240 is about 4106.8528096342. The cubic root of 16866240 is about 256.4520009436.

The spelling of 16866240 in words is "sixteen million, eight hundred sixty-six thousand, two hundred forty".