646472222 has 8 divisors (see below), whose sum is σ = 1057863672. Its totient is φ = 293851000.

The previous prime is 646472219. The next prime is 646472227. The reversal of 646472222 is 222274646.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (646472227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14692529 + ... + 14692572.

It is an arithmetic number, because the mean of its divisors is an integer number (132232959).

Almost surely, 2^646472222 is an apocalyptic number.

646472222 is a deficient number, since it is larger than the sum of its proper divisors (411391450).

646472222 is a wasteful number, since it uses less digits than its factorization.

646472222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29385114.

The product of its digits is 64512, while the sum is 35.

The square root of 646472222 is about 25425.8180202722. The cubic root of 646472222 is about 864.6691338190.

The spelling of 646472222 in words is "six hundred forty-six million, four hundred seventy-two thousand, two hundred twenty-two".