16728823944 has 128 divisors (see below), whose sum is σ = 53196960000. Its totient is φ = 4771602432.

The previous prime is 16728823919. The next prime is 16728823963. The reversal of 16728823944 is 44932882761.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 917832 + ... + 935880.

It is an arithmetic number, because the mean of its divisors is an integer number (415601250).

Almost surely, 2^16728823944 is an apocalyptic number.

16728823944 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16728823944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26598480000).

16728823944 is an abundant number, since it is smaller than the sum of its proper divisors (36468136056).

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

16728823944 is a wasteful number, since it uses less digits than its factorization.

16728823944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18684 (or 18674 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 54.

The spelling of 16728823944 in words is "sixteen billion, seven hundred twenty-eight million, eight hundred twenty-three thousand, nine hundred forty-four".