647672330 has 8 divisors (see below), whose sum is σ = 1165810212. Its totient is φ = 259068928.

The previous prime is 647672329. The next prime is 647672339. The reversal of 647672330 is 33276746.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 604520569 + 43151761 = 24587^2 + 6569^2 .

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

It is not an unprimeable number, because it can be changed into a prime (647672339) 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 3 ways as a sum of consecutive naturals, for example, 32383607 + ... + 32383626.

Almost surely, 2^647672330 is an apocalyptic number.

647672330 is a deficient number, since it is larger than the sum of its proper divisors (518137882).

647672330 is a wasteful number, since it uses less digits than its factorization.

647672330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64767240.

The product of its (nonzero) digits is 127008, while the sum is 38.

The square root of 647672330 is about 25449.4072622527. The cubic root of 647672330 is about 865.2038589761.

The spelling of 647672330 in words is "six hundred forty-seven million, six hundred seventy-two thousand, three hundred thirty".