16620808 has 8 divisors (see below), whose sum is σ = 31164030. Its totient is φ = 8310400.

The previous prime is 16620787. The next prime is 16620827. The reversal of 16620808 is 80802661.

It can be written as a sum of positive squares in only one way, i.e., 15984004 + 636804 = 3998^2 + 798^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 16620808.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1038793 + ... + 1038808.

Almost surely, 2^16620808 is an apocalyptic number.

It is an amenable number.

16620808 is a deficient number, since it is larger than the sum of its proper divisors (14543222).

16620808 is a wasteful number, since it uses less digits than its factorization.

16620808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2077607 (or 2077603 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 16620808 is about 4076.8625191439. The cubic root of 16620808 is about 255.2019827350.

The spelling of 16620808 in words is "sixteen million, six hundred twenty thousand, eight hundred eight".