647861226 has 16 divisors (see below), whose sum is σ = 1313972928. Its totient is φ = 212912000.

The previous prime is 647861197. The next prime is 647861233. The reversal of 647861226 is 622168746.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759975 + ... + 760826.

It is an arithmetic number, because the mean of its divisors is an integer number (82123308).

Almost surely, 2^647861226 is an apocalyptic number.

647861226 is an abundant number, since it is smaller than the sum of its proper divisors (666111702).

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

647861226 is a wasteful number, since it uses less digits than its factorization.

647861226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1520877.

The product of its digits is 193536, while the sum is 42.

The square root of 647861226 is about 25453.1181979733. The cubic root of 647861226 is about 865.2879640884.

The spelling of 647861226 in words is "six hundred forty-seven million, eight hundred sixty-one thousand, two hundred twenty-six".