646472224 has 24 divisors (see below), whose sum is σ = 1328080320. Its totient is φ = 309182016.

The previous prime is 646472219. The next prime is 646472227. The reversal of 646472224 is 422274646.

It is a super-3 number, since 3×646472224³ (a number of 27 digits) contains 333 as substring.

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, 438444 + ... + 439915.

It is an arithmetic number, because the mean of its divisors is an integer number (55336680).

Almost surely, 2^646472224 is an apocalyptic number.

It is an amenable number.

646472224 is an abundant number, since it is smaller than the sum of its proper divisors (681608096).

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

646472224 is a wasteful number, since it uses less digits than its factorization.

646472224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878392 (or 878384 counting only the distinct ones).

The product of its digits is 129024, while the sum is 37.

The square root of 646472224 is about 25425.8180596023. The cubic root of 646472224 is about 864.6691347107.

The spelling of 646472224 in words is "six hundred forty-six million, four hundred seventy-two thousand, two hundred twenty-four".