640200224 has 24 divisors (see below), whose sum is σ = 1261966860. Its totient is φ = 319700736.

The previous prime is 640200221. The next prime is 640200271. The reversal of 640200224 is 422002046.

It can be written as a sum of positive squares in 2 ways, for example, as 640090000 + 110224 = 25300^2 + 332^2 .

It is a junction number, because it is equal to n+sod(n) for n = 640200196 and 640200205.

It is not an unprimeable number, because it can be changed into a prime (640200221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14462 + ... + 38594.

Almost surely, 2^640200224 is an apocalyptic number.

It is an amenable number.

640200224 is a deficient number, since it is larger than the sum of its proper divisors (621766636).

640200224 is a wasteful number, since it uses less digits than its factorization.

640200224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24972 (or 24964 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 640200224 is about 25302.1782461511. The cubic root of 640200224 is about 861.8637352949.

The spelling of 640200224 in words is "six hundred forty million, two hundred thousand, two hundred twenty-four".