647433760 has 48 divisors (see below), whose sum is σ = 1578915072. Its totient is φ = 250617600.

The previous prime is 647433751. The next prime is 647433767. The reversal of 647433760 is 67334746.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is not an unprimeable number, because it can be changed into a prime (647433767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 60306 + ... + 70225.

It is an arithmetic number, because the mean of its divisors is an integer number (32894064).

Almost surely, 2^647433760 is an apocalyptic number.

It is an amenable number.

647433760 is an abundant number, since it is smaller than the sum of its proper divisors (931481312).

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

647433760 is a wasteful number, since it uses less digits than its factorization.

647433760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130577 (or 130569 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 40.

The square root of 647433760 is about 25444.7196879824. The cubic root of 647433760 is about 865.0976133618.

The spelling of 647433760 in words is "six hundred forty-seven million, four hundred thirty-three thousand, seven hundred sixty".