647828745 has 32 divisors (see below), whose sum is σ = 1070651520. Its totient is φ = 334241280.

The previous prime is 647828743. The next prime is 647828761. The reversal of 647828745 is 547828746.

It is not a de Polignac number, because 647828745 - 2¹ = 647828743 is a prime.

It is not an unprimeable number, because it can be changed into a prime (647828743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 96085 + ... + 102605.

It is an arithmetic number, because the mean of its divisors is an integer number (33457860).

Almost surely, 2^647828745 is an apocalyptic number.

It is an amenable number.

647828745 is a deficient number, since it is larger than the sum of its proper divisors (422822775).

647828745 is a wasteful number, since it uses less digits than its factorization.

647828745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6745.

The product of its digits is 3010560, while the sum is 51.

The square root of 647828745 is about 25452.4801345566. The cubic root of 647828745 is about 865.2735032301.

Subtracting from 647828745 its reverse (547828746), we obtain a palindrome (99999999).

The spelling of 647828745 in words is "six hundred forty-seven million, eight hundred twenty-eight thousand, seven hundred forty-five".