646049224 has 16 divisors (see below), whose sum is σ = 1234198620. Its totient is φ = 316929600.

The previous prime is 646049221. The next prime is 646049237. The reversal of 646049224 is 422940646.

It can be written as a sum of positive squares in 2 ways, for example, as 644652100 + 1397124 = 25390^2 + 1182^2 .

It is not an unprimeable number, because it can be changed into a prime (646049221) 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, 761427 + ... + 762274.

Almost surely, 2^646049224 is an apocalyptic number.

It is an amenable number.

646049224 is a deficient number, since it is larger than the sum of its proper divisors (588149396).

646049224 is a wasteful number, since it uses less digits than its factorization.

646049224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1523760 (or 1523756 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 37.

The square root of 646049224 is about 25417.4983820202. The cubic root of 646049224 is about 864.4805033290.

The spelling of 646049224 in words is "six hundred forty-six million, forty-nine thousand, two hundred twenty-four".