16639422 has 8 divisors (see below), whose sum is σ = 33278856. Its totient is φ = 5546472.

The previous prime is 16639411. The next prime is 16639423. The reversal of 16639422 is 22493661.

It is a sphenic number, since it is the product of 3 distinct primes.

16639422 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16639423) 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, 1386613 + ... + 1386624.

It is an arithmetic number, because the mean of its divisors is an integer number (4159857).

Almost surely, 2^16639422 is an apocalyptic number.

16639422 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

16639422 is a wasteful number, since it uses less digits than its factorization.

16639422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2773242.

The product of its digits is 15552, while the sum is 33.

The square root of 16639422 is about 4079.1447633052. The cubic root of 16639422 is about 255.2972159206.

The spelling of 16639422 in words is "sixteen million, six hundred thirty-nine thousand, four hundred twenty-two".