16691384 has 8 divisors (see below), whose sum is σ = 31296360. Its totient is φ = 8345688.

The previous prime is 16691371. The next prime is 16691401. The reversal of 16691384 is 48319661.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-3 number, since 3×16691384³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1043204 + ... + 1043219.

It is an arithmetic number, because the mean of its divisors is an integer number (3912045).

Almost surely, 2^16691384 is an apocalyptic number.

It is an amenable number.

16691384 is a deficient number, since it is larger than the sum of its proper divisors (14604976).

16691384 is a wasteful number, since it uses less digits than its factorization.

16691384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086429 (or 2086425 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 16691384 is about 4085.5090258131. The cubic root of 16691384 is about 255.5626892639.

The spelling of 16691384 in words is "sixteen million, six hundred ninety-one thousand, three hundred eighty-four".