1278288064 has 14 divisors (see below), whose sum is σ = 2536603004. Its totient is φ = 639144000.

The previous prime is 1278288059. The next prime is 1278288097. The reversal of 1278288064 is 4608828721.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9986562 + ... + 9986689.

Almost surely, 2^1278288064 is an apocalyptic number.

It is an amenable number.

1278288064 is a deficient number, since it is larger than the sum of its proper divisors (1258314940).

1278288064 is an equidigital number, since it uses as much as digits as its factorization.

1278288064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19973263 (or 19973253 counting only the distinct ones).

The product of its (nonzero) digits is 344064, while the sum is 46.

The square root of 1278288064 is about 35753.1546020767. The cubic root of 1278288064 is about 1085.2827776331.

The spelling of 1278288064 in words is "one billion, two hundred seventy-eight million, two hundred eighty-eight thousand, sixty-four".