16625728 has 112 divisors (see below), whose sum is σ = 41696640. Its totient is φ = 6414336.

The previous prime is 16625723. The next prime is 16625731. The reversal of 16625728 is 82752661.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (37).

It is not an unprimeable number, because it can be changed into a prime (16625723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 281763 + ... + 281821.

Almost surely, 2^16625728 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 16625728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20848320).

16625728 is an abundant number, since it is smaller than the sum of its proper divisors (25070912).

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

16625728 is a wasteful number, since it uses less digits than its factorization.

16625728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 122 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 16625728 is about 4077.4658796856. The cubic root of 16625728 is about 255.2271614123.

The spelling of 16625728 in words is "sixteen million, six hundred twenty-five thousand, seven hundred twenty-eight".