5645428272 has 240 divisors, whose sum is σ = 18862230240. Its totient is φ = 1609850880.

The previous prime is 5645428267. The next prime is 5645428273. The reversal of 5645428272 is 2728245465.

5645428272 is a `hidden beast` number, since 56 + 454 + 2 + 82 + 72 = 666.

It is not an unprimeable number, because it can be changed into a prime (5645428273) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 885448 + ... + 891800.

It is an arithmetic number, because the mean of its divisors is an integer number (78592626).

Almost surely, 2^5645428272 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 5645428272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9431115120).

5645428272 is an abundant number, since it is smaller than the sum of its proper divisors (13216801968).

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

5645428272 is a wasteful number, since it uses less digits than its factorization.

5645428272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6409 (or 6386 counting only the distinct ones).

The product of its digits is 1075200, while the sum is 45.

The square root of 5645428272 is about 75136.0650553381. The cubic root of 5645428272 is about 1780.5969752053.

The spelling of 5645428272 in words is "five billion, six hundred forty-five million, four hundred twenty-eight thousand, two hundred seventy-two".