1264644244 has 6 divisors (see below), whose sum is σ = 2213127434. Its totient is φ = 632322120.

The previous prime is 1264644203. The next prime is 1264644257. The reversal of 1264644244 is 4424464621.

It can be written as a sum of positive squares in only one way, i.e., 1073872900 + 190771344 = 32770^2 + 13812^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 158080527 + ... + 158080534.

Almost surely, 2^1264644244 is an apocalyptic number.

It is an amenable number.

1264644244 is a deficient number, since it is larger than the sum of its proper divisors (948483190).

1264644244 is a wasteful number, since it uses less digits than its factorization.

1264644244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316161065 (or 316161063 counting only the distinct ones).

The product of its digits is 147456, while the sum is 37.

The square root of 1264644244 is about 35561.8369041871. The cubic root of 1264644244 is about 1081.4076991232.

The spelling of 1264644244 in words is "one billion, two hundred sixty-four million, six hundred forty-four thousand, two hundred forty-four".