647937264 has 60 divisors (see below), whose sum is σ = 1804365416. Its totient is φ = 199169664.

The previous prime is 647937239. The next prime is 647937313. The reversal of 647937264 is 462739746.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 635347 + ... + 636365.

Almost surely, 2^647937264 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647937264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (902182708).

647937264 is an abundant number, since it is smaller than the sum of its proper divisors (1156428152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

647937264 is a wasteful number, since it uses less digits than its factorization.

647937264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2062 (or 1037 counting only the distinct ones).

The product of its digits is 1524096, while the sum is 48.

The square root of 647937264 is about 25454.6118414719. The cubic root of 647937264 is about 865.3218150582.

The spelling of 647937264 in words is "six hundred forty-seven million, nine hundred thirty-seven thousand, two hundred sixty-four".