16856604 has 18 divisors (see below), whose sum is σ = 42609840. Its totient is φ = 5618856.

The previous prime is 16856603. The next prime is 16856611. The reversal of 16856604 is 40665861.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 468239 = 16856604 / (1 + 6 + 8 + 5 + 6 + 6 + 0 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16856603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 234084 + ... + 234155.

Almost surely, 2^16856604 is an apocalyptic number.

It is an amenable number.

16856604 is an abundant number, since it is smaller than the sum of its proper divisors (25753236).

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

16856604 is a wasteful number, since it uses less digits than its factorization.

16856604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468249 (or 468244 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 16856604 is about 4105.6794809142. The cubic root of 16856604 is about 256.4031530234.

The spelling of 16856604 in words is "sixteen million, eight hundred fifty-six thousand, six hundred four".