1278756068 has 6 divisors (see below), whose sum is σ = 2237823126. Its totient is φ = 639378032.

The previous prime is 1278756067. The next prime is 1278756077. The reversal of 1278756068 is 8606578721.

It can be written as a sum of positive squares in only one way, i.e., 1278205504 + 550564 = 35752^2 + 742^2 .

It is not an unprimeable number, because it can be changed into a prime (1278756067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159844505 + ... + 159844512.

It is an arithmetic number, because the mean of its divisors is an integer number (372970521).

Almost surely, 2^1278756068 is an apocalyptic number.

It is an amenable number.

1278756068 is a deficient number, since it is larger than the sum of its proper divisors (959067058).

1278756068 is a wasteful number, since it uses less digits than its factorization.

1278756068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319689021 (or 319689019 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 50.

The square root of 1278756068 is about 35759.6989360928. The cubic root of 1278756068 is about 1085.4152085830.

The spelling of 1278756068 in words is "one billion, two hundred seventy-eight million, seven hundred fifty-six thousand, sixty-eight".