646266244 has 12 divisors (see below), whose sum is σ = 1217963404. Its totient is φ = 298276704.

The previous prime is 646266241. The next prime is 646266253. The reversal of 646266244 is 442662646.

It can be written as a sum of positive squares in 2 ways, for example, as 382593600 + 263672644 = 19560^2 + 16238^2 .

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 646266197 and 646266206.

It is not an unprimeable number, because it can be changed into a prime (646266241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6214047 + ... + 6214150.

Almost surely, 2^646266244 is an apocalyptic number.

It is an amenable number.

646266244 is a deficient number, since it is larger than the sum of its proper divisors (571697160).

646266244 is a wasteful number, since it uses less digits than its factorization.

646266244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12428214 (or 12428212 counting only the distinct ones).

The product of its digits is 331776, while the sum is 40.

The square root of 646266244 is about 25421.7671297650. The cubic root of 646266244 is about 864.5772908742.

The spelling of 646266244 in words is "six hundred forty-six million, two hundred sixty-six thousand, two hundred forty-four".