16601988 has 48 divisors (see below), whose sum is σ = 43076096. Its totient is φ = 4942080.

The previous prime is 16601987. The next prime is 16601989. The reversal of 16601988 is 88910661.

It is an interprime number because it is at equal distance from previous prime (16601987) and next prime (16601989).

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (16601983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3120 + ... + 6552.

Almost surely, 2^16601988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16601988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21538048).

16601988 is an abundant number, since it is smaller than the sum of its proper divisors (26474108).

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

16601988 is a wasteful number, since it uses less digits than its factorization.

16601988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484 (or 3482 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 39.

The square root of 16601988 is about 4074.5537178935. The cubic root of 16601988 is about 255.1056232950.

The spelling of 16601988 in words is "sixteen million, six hundred one thousand, nine hundred eighty-eight".