647360642 has 8 divisors (see below), whose sum is σ = 984343116. Its totient is φ = 319246272.

The previous prime is 647360639. The next prime is 647360653. The reversal of 647360642 is 246063746.

It can be written as a sum of positive squares in 2 ways, for example, as 602751601 + 44609041 = 24551^2 + 6679^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 647360596 and 647360605.

It is an unprimeable number.

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, 2216843 + ... + 2217134.

Almost surely, 2^647360642 is an apocalyptic number.

647360642 is a deficient number, since it is larger than the sum of its proper divisors (336982474).

647360642 is a wasteful number, since it uses less digits than its factorization.

647360642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4434052.

The product of its (nonzero) digits is 145152, while the sum is 38.

The square root of 647360642 is about 25443.2828463624. The cubic root of 647360642 is about 865.0650455057.

The spelling of 647360642 in words is "six hundred forty-seven million, three hundred sixty thousand, six hundred forty-two".