16997724 has 18 divisors (see below), whose sum is σ = 42966560. Its totient is φ = 5665896.

The previous prime is 16997707. The next prime is 16997767. The reversal of 16997724 is 42779961.

It is a tau number, because it is divible by the number of its divisors (18).

It is a self number, because there is not a number n which added to its sum of digits gives 16997724.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236044 + ... + 236115.

Almost surely, 2^16997724 is an apocalyptic number.

It is an amenable number.

16997724 is an abundant number, since it is smaller than the sum of its proper divisors (25968836).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16997724 is a wasteful number, since it uses less digits than its factorization.

16997724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472169 (or 472164 counting only the distinct ones).

The product of its digits is 190512, while the sum is 45.

The square root of 16997724 is about 4122.8296108377. The cubic root of 16997724 is about 257.1166835794.

The spelling of 16997724 in words is "sixteen million, nine hundred ninety-seven thousand, seven hundred twenty-four".