647359478 has 16 divisors (see below), whose sum is σ = 983003040. Its totient is φ = 319699776.

The previous prime is 647359477. The next prime is 647359483. The reversal of 647359478 is 874953746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647359477) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 273476 + ... + 275832.

It is an arithmetic number, because the mean of its divisors is an integer number (61437690).

Almost surely, 2^647359478 is an apocalyptic number.

647359478 is a deficient number, since it is larger than the sum of its proper divisors (335643562).

647359478 is a wasteful number, since it uses less digits than its factorization.

647359478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3991.

The product of its digits is 5080320, while the sum is 53.

The square root of 647359478 is about 25443.2599719454. The cubic root of 647359478 is about 865.0645270228.

The spelling of 647359478 in words is "six hundred forty-seven million, three hundred fifty-nine thousand, four hundred seventy-eight".