16807220 has 24 divisors (see below), whose sum is σ = 37372104. Its totient is φ = 6327296.

The previous prime is 16807207. The next prime is 16807243. The reversal of 16807220 is 2270861.

It can be written as a sum of positive squares in 4 ways, for example, as 4682896 + 12124324 = 2164^2 + 3482^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 16807220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24377 + ... + 25056.

It is an arithmetic number, because the mean of its divisors is an integer number (1557171).

Almost surely, 2^16807220 is an apocalyptic number.

16807220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16807220 is an abundant number, since it is smaller than the sum of its proper divisors (20564884).

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

16807220 is a wasteful number, since it uses less digits than its factorization.

16807220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49459 (or 49457 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 16807220 is about 4099.6609615918. The cubic root of 16807220 is about 256.1525173522.

The spelling of 16807220 in words is "sixteen million, eight hundred seven thousand, two hundred twenty".