647131032 has 80 divisors (see below), whose sum is σ = 1908000600. Its totient is φ = 204353280.

The previous prime is 647130973. The next prime is 647131039. The reversal of 647131032 is 230131746.

647131032 is a `hidden beast` number, since 647 + 1 + 3 + 10 + 3 + 2 = 666.

647131032 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 647130987 and 647131005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647131039) 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, 13969 + ... + 38592.

Almost surely, 2^647131032 is an apocalyptic number.

It is an amenable number.

647131032 is an abundant number, since it is smaller than the sum of its proper divisors (1260869568).

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

647131032 is a wasteful number, since it uses less digits than its factorization.

647131032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52598 (or 52585 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 647131032 is about 25438.7702532964. The cubic root of 647131032 is about 864.9627578161.

Adding to 647131032 its reverse (230131746), we get a palindrome (877262778).

The spelling of 647131032 in words is "six hundred forty-seven million, one hundred thirty-one thousand, thirty-two".