16989508 has 6 divisors (see below), whose sum is σ = 29731646. Its totient is φ = 8494752.

The previous prime is 16989491. The next prime is 16989523. The reversal of 16989508 is 80598961.

It can be written as a sum of positive squares in only one way, i.e., 16064064 + 925444 = 4008^2 + 962^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2123685 + ... + 2123692.

Almost surely, 2^16989508 is an apocalyptic number.

It is an amenable number.

16989508 is a deficient number, since it is larger than the sum of its proper divisors (12742138).

16989508 is a wasteful number, since it uses less digits than its factorization.

16989508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4247381 (or 4247379 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 46.

The square root of 16989508 is about 4121.8330873532. The cubic root of 16989508 is about 257.0752503631.

The spelling of 16989508 in words is "sixteen million, nine hundred eighty-nine thousand, five hundred eight".