16709638 has 16 divisors (see below), whose sum is σ = 28532736. Its totient is φ = 7264840.

The previous prime is 16709633. The next prime is 16709639. The reversal of 16709638 is 83690761.

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

It is a self number, because there is not a number n which added to its sum of digits gives 16709638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16709633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16006 + ... + 17017.

It is an arithmetic number, because the mean of its divisors is an integer number (1783296).

Almost surely, 2^16709638 is an apocalyptic number.

16709638 is a deficient number, since it is larger than the sum of its proper divisors (11823098).

16709638 is a wasteful number, since it uses less digits than its factorization.

16709638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33059.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 16709638 is about 4087.7424087141. The cubic root of 16709638 is about 255.6558179857.

The spelling of 16709638 in words is "sixteen million, seven hundred nine thousand, six hundred thirty-eight".