16859840 has 112 divisors (see below), whose sum is σ = 43891200. Its totient is φ = 6147072.

The previous prime is 16859839. The next prime is 16859849. The reversal of 16859840 is 4895861.

It is not an unprimeable number, because it can be changed into a prime (16859849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 285731 + ... + 285789.

Almost surely, 2^16859840 is an apocalyptic number.

16859840 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 16859840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21945600).

16859840 is an abundant number, since it is smaller than the sum of its proper divisors (27031360).

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

16859840 is a wasteful number, since it uses less digits than its factorization.

16859840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 132 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 16859840 is about 4106.0735502424. The cubic root of 16859840 is about 256.4195594026.

The spelling of 16859840 in words is "sixteen million, eight hundred fifty-nine thousand, eight hundred forty".