16689982 has 8 divisors (see below), whose sum is σ = 25567776. Its totient is φ = 8167392.

The previous prime is 16689941. The next prime is 16690001. The reversal of 16689982 is 28998661.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

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, 88683 + ... + 88870.

It is an arithmetic number, because the mean of its divisors is an integer number (3195972).

Almost surely, 2^16689982 is an apocalyptic number.

16689982 is a deficient number, since it is larger than the sum of its proper divisors (8877794).

16689982 is a wasteful number, since it uses less digits than its factorization.

16689982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177602.

The product of its digits is 373248, while the sum is 49.

The square root of 16689982 is about 4085.3374401633. The cubic root of 16689982 is about 255.5555336974. Note that the first 4 decimals are identical.

It can be divided in two parts, 16689 and 982, that added together give a palindrome (17671).

The spelling of 16689982 in words is "sixteen million, six hundred eighty-nine thousand, nine hundred eighty-two".