16688344 has 8 divisors (see below), whose sum is σ = 31290660. Its totient is φ = 8344168.

The previous prime is 16688333. The next prime is 16688377. The reversal of 16688344 is 44388661.

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

It is a junction number, because it is equal to n+sod(n) for n = 16688297 and 16688306.

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, 1043014 + ... + 1043029.

Almost surely, 2^16688344 is an apocalyptic number.

It is an amenable number.

16688344 is a deficient number, since it is larger than the sum of its proper divisors (14602316).

16688344 is a wasteful number, since it uses less digits than its factorization.

16688344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086049 (or 2086045 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 16688344 is about 4085.1369622082. The cubic root of 16688344 is about 255.5471731200.

The spelling of 16688344 in words is "sixteen million, six hundred eighty-eight thousand, three hundred forty-four".