647670040 has 16 divisors (see below), whose sum is σ = 1457257680. Its totient is φ = 259068000.

The previous prime is 647670019. The next prime is 647670047. The reversal of 647670040 is 40076746.

It is a junction number, because it is equal to n+sod(n) for n = 647669978 and 647670005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (647670047) 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, 8095836 + ... + 8095915.

It is an arithmetic number, because the mean of its divisors is an integer number (91078605).

Almost surely, 2^647670040 is an apocalyptic number.

It is an amenable number.

647670040 is an abundant number, since it is smaller than the sum of its proper divisors (809587640).

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

647670040 is a wasteful number, since it uses less digits than its factorization.

647670040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16191762 (or 16191758 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 34.

The square root of 647670040 is about 25449.3622709882. The cubic root of 647670040 is about 865.2028392634.

The spelling of 647670040 in words is "six hundred forty-seven million, six hundred seventy thousand, forty".