647789496 has 64 divisors (see below), whose sum is σ = 1744406400. Its totient is φ = 199801728.

The previous prime is 647789491. The next prime is 647789533. The reversal of 647789496 is 694987746.

It is a super-2 number, since 2×647789496² = 839262462255868032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647789491) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3090 + ... + 36126.

It is an arithmetic number, because the mean of its divisors is an integer number (27256350).

Almost surely, 2^647789496 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 647789496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (872203200).

647789496 is an abundant number, since it is smaller than the sum of its proper divisors (1096616904).

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

647789496 is a wasteful number, since it uses less digits than its factorization.

647789496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33108 (or 33104 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 60.

The square root of 647789496 is about 25451.7090978190. The cubic root of 647789496 is about 865.2560285473.

The spelling of 647789496 in words is "six hundred forty-seven million, seven hundred eighty-nine thousand, four hundred ninety-six".