16864980 has 144 divisors (see below), whose sum is σ = 54698112. Its totient is φ = 3872000.

The previous prime is 16864943. The next prime is 16864993. The reversal of 16864980 is 8946861.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 166930 + ... + 167030.

It is an arithmetic number, because the mean of its divisors is an integer number (379848).

Almost surely, 2^16864980 is an apocalyptic number.

16864980 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 16864980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27349056).

16864980 is an abundant number, since it is smaller than the sum of its proper divisors (37833132).

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

16864980 is a wasteful number, since it uses less digits than its factorization.

16864980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158 (or 145 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 16864980 is about 4106.6994046314. The cubic root of 16864980 is about 256.4456146641.

It can be divided in two parts, 1686 and 4980, that added together give a palindrome (6666).

The spelling of 16864980 in words is "sixteen million, eight hundred sixty-four thousand, nine hundred eighty".