1264228538 has 8 divisors (see below), whose sum is σ = 1927430580. Its totient is φ = 621751680.

The previous prime is 1264228529. The next prime is 1264228571. The reversal of 1264228538 is 8358224621.

It can be written as a sum of positive squares in 2 ways, for example, as 1037033209 + 227195329 = 32203^2 + 15073^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1264228495 and 1264228504.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5181143 + ... + 5181386.

Almost surely, 2^1264228538 is an apocalyptic number.

1264228538 is a deficient number, since it is larger than the sum of its proper divisors (663202042).

1264228538 is a wasteful number, since it uses less digits than its factorization.

1264228538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10362592.

The product of its digits is 184320, while the sum is 41.

The square root of 1264228538 is about 35555.9915907291. The cubic root of 1264228538 is about 1081.2891949305.

The spelling of 1264228538 in words is "one billion, two hundred sixty-four million, two hundred twenty-eight thousand, five hundred thirty-eight".