16859808 has 72 divisors (see below), whose sum is σ = 54800928. Its totient is φ = 4816512.

The previous prime is 16859803. The next prime is 16859809. The reversal of 16859808 is 80895861.

It is a tau number, because it is divible by the number of its divisors (72).

It is not an unprimeable number, because it can be changed into a prime (16859803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2166 + ... + 6197.

It is an arithmetic number, because the mean of its divisors is an integer number (761124).

Almost surely, 2^16859808 is an apocalyptic number.

16859808 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16859808 is an abundant number, since it is smaller than the sum of its proper divisors (37941120).

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

16859808 is a wasteful number, since it uses less digits than its factorization.

16859808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8386 (or 8375 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 45.

The square root of 16859808 is about 4106.0696535738. The cubic root of 16859808 is about 256.4193971743.

The spelling of 16859808 in words is "sixteen million, eight hundred fifty-nine thousand, eight hundred eight".