16249728 has 64 divisors (see below), whose sum is σ = 47099520. Its totient is φ = 4922880.

The previous prime is 16249691. The next prime is 16249741. The reversal of 16249728 is 82794261.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2301 + ... + 6147.

It is an arithmetic number, because the mean of its divisors is an integer number (735930).

Almost surely, 2^16249728 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 16249728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23549760).

16249728 is an abundant number, since it is smaller than the sum of its proper divisors (30849792).

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

16249728 is a wasteful number, since it uses less digits than its factorization.

16249728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875 (or 3863 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The square root of 16249728 is about 4031.0951365603. The cubic root of 16249728 is about 253.2884377197.

The spelling of 16249728 in words is "sixteen million, two hundred forty-nine thousand, seven hundred twenty-eight".