647488144 has 20 divisors (see below), whose sum is σ = 1255633920. Its totient is φ = 323453600.

The previous prime is 647488141. The next prime is 647488147. The reversal of 647488144 is 441884746.

It is an interprime number because it is at equal distance from previous prime (647488141) and next prime (647488147).

It is a junction number, because it is equal to n+sod(n) for n = 647488094 and 647488103.

It is not an unprimeable number, because it can be changed into a prime (647488141) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 837 + ... + 35995.

It is an arithmetic number, because the mean of its divisors is an integer number (62781696).

Almost surely, 2^647488144 is an apocalyptic number.

It is an amenable number.

647488144 is a deficient number, since it is larger than the sum of its proper divisors (608145776).

647488144 is a wasteful number, since it uses less digits than its factorization.

647488144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36318 (or 36312 counting only the distinct ones).

The product of its digits is 688128, while the sum is 46.

The square root of 647488144 is about 25445.7883352039. The cubic root of 647488144 is about 865.1218352227.

The spelling of 647488144 in words is "six hundred forty-seven million, four hundred eighty-eight thousand, one hundred forty-four".