647321290 has 64 divisors (see below), whose sum is σ = 1492017408. Its totient is φ = 196300800.

The previous prime is 647321287. The next prime is 647321303. The reversal of 647321290 is 92123746.

647321290 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17130 + ... + 39850.

It is an arithmetic number, because the mean of its divisors is an integer number (23312772).

Almost surely, 2^647321290 is an apocalyptic number.

647321290 is an abundant number, since it is smaller than the sum of its proper divisors (844696118).

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

647321290 is a wasteful number, since it uses less digits than its factorization.

647321290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22783.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 647321290 is about 25442.5095067291. The cubic root of 647321290 is about 865.0475165184.

The spelling of 647321290 in words is "six hundred forty-seven million, three hundred twenty-one thousand, two hundred ninety".