9420472728 has 24 divisors (see below), whose sum is σ = 25513780500. Its totient is φ = 3140157552.

The previous prime is 9420472709. The next prime is 9420472729. The reversal of 9420472728 is 8272740249.

9420472728 is a `hidden beast` number, since 94 + 20 + 472 + 72 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9420472729) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 65419878 + ... + 65420021.

Almost surely, 2^9420472728 is an apocalyptic number.

It is an amenable number.

9420472728 is an abundant number, since it is smaller than the sum of its proper divisors (16093307772).

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

9420472728 is a wasteful number, since it uses less digits than its factorization.

9420472728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130839911 (or 130839904 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 9420472728 is about 97059.1197569811. The cubic root of 9420472728 is about 2111.9853380094.

The spelling of 9420472728 in words is "nine billion, four hundred twenty million, four hundred seventy-two thousand, seven hundred twenty-eight".