647481732 has 24 divisors (see below), whose sum is σ = 1511225856. Its totient is φ = 215765088.

The previous prime is 647481721. The next prime is 647481733. The reversal of 647481732 is 237184746.

It is not an unprimeable number, because it can be changed into a prime (647481733) 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, 57693 + ... + 67995.

It is an arithmetic number, because the mean of its divisors is an integer number (62967744).

Almost surely, 2^647481732 is an apocalyptic number.

It is an amenable number.

647481732 is an abundant number, since it is smaller than the sum of its proper divisors (863744124).

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

647481732 is a wasteful number, since it uses less digits than its factorization.

647481732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15547 (or 15545 counting only the distinct ones).

The product of its digits is 225792, while the sum is 42.

The square root of 647481732 is about 25445.6623415465. The cubic root of 647481732 is about 865.1189794795.

The spelling of 647481732 in words is "six hundred forty-seven million, four hundred eighty-one thousand, seven hundred thirty-two".