647440532 has 12 divisors (see below), whose sum is σ = 1133381760. Its totient is φ = 323617176.

The previous prime is 647440517. The next prime is 647440537. The reversal of 647440532 is 235044746.

It is a junction number, because it is equal to n+sod(n) for n = 647440492 and 647440501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647440537) by changing a digit.

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, 10658 + ... + 37529.

It is an arithmetic number, because the mean of its divisors is an integer number (94448480).

Almost surely, 2^647440532 is an apocalyptic number.

It is an amenable number.

647440532 is a deficient number, since it is larger than the sum of its proper divisors (485941228).

647440532 is a wasteful number, since it uses less digits than its factorization.

647440532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51550 (or 51548 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 35.

The square root of 647440532 is about 25444.8527604307. The cubic root of 647440532 is about 865.1006295883.

The spelling of 647440532 in words is "six hundred forty-seven million, four hundred forty thousand, five hundred thirty-two".