4251728 has 20 divisors (see below), whose sum is σ = 8871828. Its totient is φ = 1962240.

The previous prime is 4251727. The next prime is 4251733. The reversal of 4251728 is 8271524.

It can be written as a sum of positive squares in 2 ways, for example, as 2096704 + 2155024 = 1448^2 + 1468^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 4251728.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4251721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10013 + ... + 10428.

Almost surely, 2^4251728 is an apocalyptic number.

It is an amenable number.

4251728 is an abundant number, since it is smaller than the sum of its proper divisors (4620100).

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

4251728 is a wasteful number, since it uses less digits than its factorization.

4251728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20462 (or 20456 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 4251728 is about 2061.9718717771. The cubic root of 4251728 is about 162.0025402233.

The spelling of 4251728 in words is "four million, two hundred fifty-one thousand, seven hundred twenty-eight".