16550720 has 28 divisors (see below), whose sum is σ = 39412164. Its totient is φ = 6620160.

The previous prime is 16550717. The next prime is 16550747. The reversal of 16550720 is 2705561.

It can be written as a sum of positive squares in 2 ways, for example, as 3125824 + 13424896 = 1768^2 + 3664^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16550720.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 25541 + ... + 26180.

Almost surely, 2^16550720 is an apocalyptic number.

16550720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16550720 is an abundant number, since it is smaller than the sum of its proper divisors (22861444).

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

16550720 is an equidigital number, since it uses as much as digits as its factorization.

16550720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51738 (or 51728 counting only the distinct ones).

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 16550720 is about 4068.2576122955. The cubic root of 16550720 is about 254.8427583715.

The spelling of 16550720 in words is "sixteen million, five hundred fifty thousand, seven hundred twenty".