16840560 has 80 divisors (see below), whose sum is σ = 56960640. Its totient is φ = 4081920.

The previous prime is 16840559. The next prime is 16840567. The reversal of 16840560 is 6504861.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×16840560² = 567208922227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16840567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 550 + ... + 5829.

It is an arithmetic number, because the mean of its divisors is an integer number (712008).

Almost surely, 2^16840560 is an apocalyptic number.

16840560 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 16840560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28480320).

16840560 is an abundant number, since it is smaller than the sum of its proper divisors (40120080).

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

16840560 is a wasteful number, since it uses less digits than its factorization.

16840560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6406 (or 6400 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 16840560 is about 4103.7251369944. The cubic root of 16840560 is about 256.3217796139.

The spelling of 16840560 in words is "sixteen million, eight hundred forty thousand, five hundred sixty".