647135882 has 8 divisors (see below), whose sum is σ = 994379652. Its totient is φ = 315676000.

The previous prime is 647135857. The next prime is 647135891. The reversal of 647135882 is 288531746.

It can be written as a sum of positive squares in 2 ways, for example, as 609546721 + 37589161 = 24689^2 + 6131^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3945869 + ... + 3946032.

Almost surely, 2^647135882 is an apocalyptic number.

647135882 is a deficient number, since it is larger than the sum of its proper divisors (347243770).

647135882 is a wasteful number, since it uses less digits than its factorization.

647135882 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7891944.

The product of its digits is 322560, while the sum is 44.

The square root of 647135882 is about 25438.8655800529. The cubic root of 647135882 is about 864.9649186659.

The spelling of 647135882 in words is "six hundred forty-seven million, one hundred thirty-five thousand, eight hundred eighty-two".