647241320 has 64 divisors (see below), whose sum is σ = 1592835840. Its totient is φ = 234745600.

The previous prime is 647241317. The next prime is 647241337. The reversal of 647241320 is 23142746.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 187934 + ... + 191346.

It is an arithmetic number, because the mean of its divisors is an integer number (24888060).

Almost surely, 2^647241320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 647241320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (796417920).

647241320 is an abundant number, since it is smaller than the sum of its proper divisors (945594520).

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

647241320 is a wasteful number, since it uses less digits than its factorization.

647241320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3866 (or 3862 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 647241320 is about 25440.9378757938. The cubic root of 647241320 is about 865.0118924267.

The spelling of 647241320 in words is "six hundred forty-seven million, two hundred forty-one thousand, three hundred twenty".