1264229128 has 16 divisors (see below), whose sum is σ = 2370816000. Its totient is φ = 632011536.

The previous prime is 1264229119. The next prime is 1264229129. The reversal of 1264229128 is 8219224621.

It is not an unprimeable number, because it can be changed into a prime (1264229129) 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, 72793 + ... + 88471.

It is an arithmetic number, because the mean of its divisors is an integer number (148176000).

Almost surely, 2^1264229128 is an apocalyptic number.

It is an amenable number.

1264229128 is a deficient number, since it is larger than the sum of its proper divisors (1106586872).

1264229128 is a wasteful number, since it uses less digits than its factorization.

1264229128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25764 (or 25760 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 1264229128 is about 35555.9998875014. Note that the first 3 decimals coincide. The cubic root of 1264229128 is about 1081.2893631387.

The spelling of 1264229128 in words is "one billion, two hundred sixty-four million, two hundred twenty-nine thousand, one hundred twenty-eight".