16638248 has 32 divisors (see below), whose sum is σ = 34832160. Its totient is φ = 7385280.

The previous prime is 16638247. The next prime is 16638277. The reversal of 16638248 is 84283661.

It is a happy number.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (16638247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1586 + ... + 5982.

It is an arithmetic number, because the mean of its divisors is an integer number (1088505).

Almost surely, 2^16638248 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16638248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17416080).

16638248 is an abundant number, since it is smaller than the sum of its proper divisors (18193912).

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

16638248 is a wasteful number, since it uses less digits than its factorization.

16638248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4457 (or 4453 counting only the distinct ones).

The product of its digits is 55296, while the sum is 38.

The square root of 16638248 is about 4079.0008580534. Note that the first 3 decimals coincide. The cubic root of 16638248 is about 255.2912115858.

The spelling of 16638248 in words is "sixteen million, six hundred thirty-eight thousand, two hundred forty-eight".