647262338 has 16 divisors (see below), whose sum is σ = 996599160. Its totient is φ = 315168000.

The previous prime is 647262337. The next prime is 647262347. The reversal of 647262338 is 833262746.

It can be written as a sum of positive squares in 4 ways, for example, as 371602729 + 275659609 = 19277^2 + 16603^2 .

It is a junction number, because it is equal to n+sod(n) for n = 647262295 and 647262304.

It is not an unprimeable number, because it can be changed into a prime (647262331) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 13943 + ... + 38586.

Almost surely, 2^647262338 is an apocalyptic number.

647262338 is a deficient number, since it is larger than the sum of its proper divisors (349336822).

647262338 is a wasteful number, since it uses less digits than its factorization.

647262338 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52693.

The product of its digits is 290304, while the sum is 41.

The square root of 647262338 is about 25441.3509468346. The cubic root of 647262338 is about 865.0212555615.

The spelling of 647262338 in words is "six hundred forty-seven million, two hundred sixty-two thousand, three hundred thirty-eight".