16628217 has 8 divisors (see below), whose sum is σ = 22386624. Its totient is φ = 10977648.

The previous prime is 16628203. The next prime is 16628219. The reversal of 16628217 is 71282661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 16628217 - 2⁷ = 16628089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16628219) 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, 26598 + ... + 27215.

It is an arithmetic number, because the mean of its divisors is an integer number (2798328).

Almost surely, 2^16628217 is an apocalyptic number.

It is an amenable number.

16628217 is a deficient number, since it is larger than the sum of its proper divisors (5758407).

16628217 is a wasteful number, since it uses less digits than its factorization.

16628217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53919.

The product of its digits is 8064, while the sum is 33.

The square root of 16628217 is about 4077.7710823439. The cubic root of 16628217 is about 255.2398972698.

The spelling of 16628217 in words is "sixteen million, six hundred twenty-eight thousand, two hundred seventeen".