647782272 has 160 divisors (see below), whose sum is σ = 1973979480. Its totient is φ = 210760704.

The previous prime is 647782237. The next prime is 647782277. The reversal of 647782272 is 272287746.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647782277) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 445098 + ... + 446550.

Almost surely, 2^647782272 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 647782272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (986989740).

647782272 is an abundant number, since it is smaller than the sum of its proper divisors (1326197208).

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

647782272 is a wasteful number, since it uses less digits than its factorization.

647782272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1522 (or 1501 counting only the distinct ones).

The product of its digits is 526848, while the sum is 45.

The square root of 647782272 is about 25451.5671816099. The cubic root of 647782272 is about 865.2528121563.

The spelling of 647782272 in words is "six hundred forty-seven million, seven hundred eighty-two thousand, two hundred seventy-two".