16985620 has 24 divisors (see below), whose sum is σ = 37548000. Its totient is φ = 6436512.

The previous prime is 16985609. The next prime is 16985621. The reversal of 16985620 is 2658961.

It is a super-2 number, since 2×16985620² = 577022573568800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16985620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16985621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21970 + ... + 22729.

It is an arithmetic number, because the mean of its divisors is an integer number (1564500).

Almost surely, 2^16985620 is an apocalyptic number.

16985620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16985620 is an abundant number, since it is smaller than the sum of its proper divisors (20562380).

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

16985620 is a wasteful number, since it uses less digits than its factorization.

16985620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44727 (or 44725 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 16985620 is about 4121.3614255486. The cubic root of 16985620 is about 257.0556385566.

The spelling of 16985620 in words is "sixteen million, nine hundred eighty-five thousand, six hundred twenty".