16989436 has 24 divisors (see below), whose sum is σ = 30545424. Its totient is φ = 8265600.

The previous prime is 16989421. The next prime is 16989461. The reversal of 16989436 is 63498961.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23886 + ... + 24586.

It is an arithmetic number, because the mean of its divisors is an integer number (1272726).

Almost surely, 2^16989436 is an apocalyptic number.

It is an amenable number.

16989436 is a deficient number, since it is larger than the sum of its proper divisors (13555988).

16989436 is a wasteful number, since it uses less digits than its factorization.

16989436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861 (or 859 counting only the distinct ones).

The product of its digits is 279936, while the sum is 46.

The square root of 16989436 is about 4121.8243533659. The cubic root of 16989436 is about 257.0748872087.

The spelling of 16989436 in words is "sixteen million, nine hundred eighty-nine thousand, four hundred thirty-six".