16639332 has 12 divisors (see below), whose sum is σ = 38825136. Its totient is φ = 5546440.

The previous prime is 16639289. The next prime is 16639333. The reversal of 16639332 is 23393661.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 16639293 and 16639302.

It is not an unprimeable number, because it can be changed into a prime (16639333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693294 + ... + 693317.

It is an arithmetic number, because the mean of its divisors is an integer number (3235428).

Almost surely, 2^16639332 is an apocalyptic number.

16639332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16639332 is an abundant number, since it is smaller than the sum of its proper divisors (22185804).

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

16639332 is a wasteful number, since it uses less digits than its factorization.

16639332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1386618 (or 1386616 counting only the distinct ones).

The product of its digits is 17496, while the sum is 33.

The square root of 16639332 is about 4079.1337315661. The cubic root of 16639332 is about 255.2967556323.

The spelling of 16639332 in words is "sixteen million, six hundred thirty-nine thousand, three hundred thirty-two".