647642226 has 32 divisors (see below), whose sum is σ = 1614901248. Its totient is φ = 168218640.

The previous prime is 647642207. The next prime is 647642243. The reversal of 647642226 is 622246746.

647642226 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 15 ways as a sum of consecutive naturals, for example, 700450 + ... + 701373.

It is an arithmetic number, because the mean of its divisors is an integer number (50465664).

Almost surely, 2^647642226 is an apocalyptic number.

647642226 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

647642226 is an abundant number, since it is smaller than the sum of its proper divisors (967259022).

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

647642226 is a wasteful number, since it uses less digits than its factorization.

647642226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1401846.

The product of its digits is 193536, while the sum is 39.

The square root of 647642226 is about 25448.8158074202. The cubic root of 647642226 is about 865.1904537920.

The spelling of 647642226 in words is "six hundred forty-seven million, six hundred forty-two thousand, two hundred twenty-six".