4921345728 has 448 divisors, whose sum is σ = 16604528640. Its totient is φ = 1418342400.

The previous prime is 4921345727. The next prime is 4921345747. The reversal of 4921345728 is 8275431294.

4921345728 is a `hidden beast` number, since 49 + 2 + 1 + 34 + 572 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (4921345727) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 25766113 + ... + 25766303.

It is an arithmetic number, because the mean of its divisors is an integer number (37063680).

Almost surely, 2^4921345728 is an apocalyptic number.

4921345728 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 4921345728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8302264320).

4921345728 is an abundant number, since it is smaller than the sum of its proper divisors (11683182912).

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

4921345728 is a wasteful number, since it uses less digits than its factorization.

4921345728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293 (or 277 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The square root of 4921345728 is about 70152.3037968106. The cubic root of 4921345728 is about 1700.9620538428.

The spelling of 4921345728 in words is "four billion, nine hundred twenty-one million, three hundred forty-five thousand, seven hundred twenty-eight".