16857740 has 12 divisors (see below), whose sum is σ = 35401296. Its totient is φ = 6743088.

The previous prime is 16857733. The next prime is 16857749. The reversal of 16857740 is 4775861.

It is a junction number, because it is equal to n+sod(n) for n = 16857694 and 16857703.

It is not an unprimeable number, because it can be changed into a prime (16857749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 421424 + ... + 421463.

It is an arithmetic number, because the mean of its divisors is an integer number (2950108).

Almost surely, 2^16857740 is an apocalyptic number.

16857740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16857740 is an abundant number, since it is smaller than the sum of its proper divisors (18543556).

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

16857740 is a wasteful number, since it uses less digits than its factorization.

16857740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 842896 (or 842894 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 38.

The square root of 16857740 is about 4105.8178235280. The cubic root of 16857740 is about 256.4089127331.

The spelling of 16857740 in words is "sixteen million, eight hundred fifty-seven thousand, seven hundred forty".