16918628 has 6 divisors (see below), whose sum is σ = 29607606. Its totient is φ = 8459312.

The previous prime is 16918619. The next prime is 16918669. The reversal of 16918628 is 82681961.

It can be written as a sum of positive squares in only one way, i.e., 13897984 + 3020644 = 3728^2 + 1738^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2114825 + ... + 2114832.

It is an arithmetic number, because the mean of its divisors is an integer number (4934601).

Almost surely, 2^16918628 is an apocalyptic number.

It is an amenable number.

16918628 is a deficient number, since it is larger than the sum of its proper divisors (12688978).

16918628 is a wasteful number, since it uses less digits than its factorization.

16918628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229661 (or 4229659 counting only the distinct ones).

The product of its digits is 41472, while the sum is 41.

The square root of 16918628 is about 4113.2259845528. The cubic root of 16918628 is about 256.7172472044.

The spelling of 16918628 in words is "sixteen million, nine hundred eighteen thousand, six hundred twenty-eight".