1264729268 has 18 divisors (see below), whose sum is σ = 2432775618. Its totient is φ = 574876720.

The previous prime is 1264729261. The next prime is 1264729273. The reversal of 1264729268 is 8629274621.

It can be written as a sum of positive squares in only one way, i.e., 1225140004 + 39589264 = 35002^2 + 6292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264729261) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1306055 + ... + 1307022.

It is an arithmetic number, because the mean of its divisors is an integer number (135154201).

Almost surely, 2^1264729268 is an apocalyptic number.

It is an amenable number.

1264729268 is a deficient number, since it is larger than the sum of its proper divisors (1168046350).

1264729268 is a wasteful number, since it uses less digits than its factorization.

1264729268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2613103 (or 2613090 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 1264729268 is about 35563.0323229052. The cubic root of 1264729268 is about 1081.4319334875.

The spelling of 1264729268 in words is "one billion, two hundred sixty-four million, seven hundred twenty-nine thousand, two hundred sixty-eight".