16628047 has 4 divisors (see below), whose sum is σ = 16638696. Its totient is φ = 16617400.

The previous prime is 16628039. The next prime is 16628069. The reversal of 16628047 is 74082661.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 74082661 = 2251 ⋅32911.

It is a cyclic number.

It is not a de Polignac number, because 16628047 - 2³ = 16628039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16628077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2473 + ... + 6274.

It is an arithmetic number, because the mean of its divisors is an integer number (4159674).

Almost surely, 2^16628047 is an apocalyptic number.

16628047 is a deficient number, since it is larger than the sum of its proper divisors (10649).

16628047 is an equidigital number, since it uses as much as digits as its factorization.

16628047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10648.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 16628047 is about 4077.7502375697. The cubic root of 16628047 is about 255.2390274445.

The spelling of 16628047 in words is "sixteen million, six hundred twenty-eight thousand, forty-seven".