16644768 has 192 divisors, whose sum is σ = 55738368. Its totient is φ = 4239360.

The previous prime is 16644763. The next prime is 16644769. The reversal of 16644768 is 86744661.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16644763) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 354121 + ... + 354167.

It is an arithmetic number, because the mean of its divisors is an integer number (290304).

Almost surely, 2^16644768 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 16644768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27869184).

16644768 is an abundant number, since it is smaller than the sum of its proper divisors (39093600).

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

16644768 is a wasteful number, since it uses less digits than its factorization.

16644768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115 (or 107 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 16644768 is about 4079.7999950978. The cubic root of 16644768 is about 255.3245540652.

The spelling of 16644768 in words is "sixteen million, six hundred forty-four thousand, seven hundred sixty-eight".