16868560 has 20 divisors (see below), whose sum is σ = 39219588. Its totient is φ = 6747392.

The previous prime is 16868543. The next prime is 16868563. The reversal of 16868560 is 6586861.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4562496 + 12306064 = 2136^2 + 3508^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16868563) 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, 105349 + ... + 105508.

Almost surely, 2^16868560 is an apocalyptic number.

16868560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16868560 is an abundant number, since it is smaller than the sum of its proper divisors (22351028).

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

16868560 is a wasteful number, since it uses less digits than its factorization.

16868560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210870 (or 210864 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 40.

The square root of 16868560 is about 4107.1352546513. The cubic root of 16868560 is about 256.4637589755.

The spelling of 16868560 in words is "sixteen million, eight hundred sixty-eight thousand, five hundred sixty".