647090646 has 16 divisors (see below), whose sum is σ = 1294723008. Its totient is φ = 215606600.

The previous prime is 647090597. The next prime is 647090677. The reversal of 647090646 is 646090746.

647090646 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 647090598 and 647090607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6120 + ... + 36491.

It is an arithmetic number, because the mean of its divisors is an integer number (80920188).

Almost surely, 2^647090646 is an apocalyptic number.

647090646 is an abundant number, since it is smaller than the sum of its proper divisors (647632362).

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

647090646 is a wasteful number, since it uses less digits than its factorization.

647090646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45147.

The product of its (nonzero) digits is 217728, while the sum is 42.

The square root of 647090646 is about 25437.9764525404. The cubic root of 647090646 is about 864.9447639782.

The spelling of 647090646 in words is "six hundred forty-seven million, ninety thousand, six hundred forty-six".