4451140728 has 64 divisors (see below), whose sum is σ = 12665872800. Its totient is φ = 1447522560.

The previous prime is 4451140721. The next prime is 4451140741. The reversal of 4451140728 is 8270411544.

It is a happy number.

4451140728 is a `hidden beast` number, since 445 + 1 + 140 + 72 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 4451140692 and 4451140701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4451140721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242451 + ... + 260162.

Almost surely, 2^4451140728 is an apocalyptic number.

It is an amenable number.

4451140728 is an abundant number, since it is smaller than the sum of its proper divisors (8214732072).

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

4451140728 is a wasteful number, since it uses less digits than its factorization.

4451140728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 502669 (or 502659 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 36.

The square root of 4451140728 is about 66716.8698906056. The cubic root of 4451140728 is about 1644.9666913061.

The spelling of 4451140728 in words is "four billion, four hundred fifty-one million, one hundred forty thousand, seven hundred twenty-eight".