4891434728 has 32 divisors (see below), whose sum is σ = 9406689600. Its totient is φ = 2383250688.

The previous prime is 4891434719. The next prime is 4891434739. The reversal of 4891434728 is 8274341984.

It is a happy number.

It is a super-2 number, since 2×4891434728² = 47852267396568867968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132533 + ... + 165371.

It is an arithmetic number, because the mean of its divisors is an integer number (293959050).

Almost surely, 2^4891434728 is an apocalyptic number.

It is an amenable number.

4891434728 is a deficient number, since it is larger than the sum of its proper divisors (4515254872).

4891434728 is a wasteful number, since it uses less digits than its factorization.

4891434728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33321 (or 33317 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The square root of 4891434728 is about 69938.7927262117. The cubic root of 4891434728 is about 1697.5090078134.

The spelling of 4891434728 in words is "four billion, eight hundred ninety-one million, four hundred thirty-four thousand, seven hundred twenty-eight".