645322224 has 40 divisors (see below), whose sum is σ = 1739567232. Its totient is φ = 205754560.

The previous prime is 645322187. The next prime is 645322231. The reversal of 645322224 is 422223546.

It is a junction number, because it is equal to n+sod(n) for n = 645322191 and 645322200.

It is a congruent number.

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, 291162 + ... + 293369.

Almost surely, 2^645322224 is an apocalyptic number.

It is an amenable number.

645322224 is an abundant number, since it is smaller than the sum of its proper divisors (1094245008).

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

645322224 is a wasteful number, since it uses less digits than its factorization.

645322224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 584565 (or 584559 counting only the distinct ones).

The product of its digits is 23040, while the sum is 30.

The square root of 645322224 is about 25403.1931851096. The cubic root of 645322224 is about 864.1561146229.

It can be divided in two parts, 645322 and 224, that added together give a palindrome (645546).

The spelling of 645322224 in words is "six hundred forty-five million, three hundred twenty-two thousand, two hundred twenty-four".