16620856 has 16 divisors (see below), whose sum is σ = 35616240. Its totient is φ = 7123200.

The previous prime is 16620847. The next prime is 16620893. The reversal of 16620856 is 65802661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 148345 + ... + 148456.

It is an arithmetic number, because the mean of its divisors is an integer number (2226015).

Almost surely, 2^16620856 is an apocalyptic number.

It is an amenable number.

16620856 is an abundant number, since it is smaller than the sum of its proper divisors (18995384).

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

16620856 is a wasteful number, since it uses less digits than its factorization.

16620856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 296814 (or 296810 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 16620856 is about 4076.8684060195. The cubic root of 16620856 is about 255.2022284047.

The spelling of 16620856 in words is "sixteen million, six hundred twenty thousand, eight hundred fifty-six".