4445173728 has 192 divisors, whose sum is σ = 13820083200. Its totient is φ = 1403319168.

The previous prime is 4445173727. The next prime is 4445173757. The reversal of 4445173728 is 8273715444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4445173723) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1328025 + ... + 1331367.

It is an arithmetic number, because the mean of its divisors is an integer number (71979600).

Almost surely, 2^4445173728 is an apocalyptic number.

4445173728 is a gapful number since it is divisible by the number (48) 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 4445173728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6910041600).

4445173728 is an abundant number, since it is smaller than the sum of its proper divisors (9374909472).

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

4445173728 is an equidigital number, since it uses as much as digits as its factorization.

4445173728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3393 (or 3367 counting only the distinct ones).

The product of its digits is 752640, while the sum is 45.

The square root of 4445173728 is about 66672.1360689756. The cubic root of 4445173728 is about 1644.2313063642.

The spelling of 4445173728 in words is "four billion, four hundred forty-five million, one hundred seventy-three thousand, seven hundred twenty-eight".