16689860 has 48 divisors (see below), whose sum is σ = 38646720. Its totient is φ = 6003840.

The previous prime is 16689857. The next prime is 16689863. The reversal of 16689860 is 6898661.

It is an interprime number because it is at equal distance from previous prime (16689857) and next prime (16689863).

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (16689863) 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, 23186 + ... + 23894.

It is an arithmetic number, because the mean of its divisors is an integer number (805140).

Almost surely, 2^16689860 is an apocalyptic number.

16689860 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 16689860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19323360).

16689860 is an abundant number, since it is smaller than the sum of its proper divisors (21956860).

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

16689860 is a wasteful number, since it uses less digits than its factorization.

16689860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 836 (or 834 counting only the distinct ones).

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 16689860 is about 4085.3225086889. The cubic root of 16689860 is about 255.5549110115.

The spelling of 16689860 in words is "sixteen million, six hundred eighty-nine thousand, eight hundred sixty".