1278230528 has 30 divisors (see below), whose sum is σ = 2556415806. Its totient is φ = 639107072.

The previous prime is 1278230519. The next prime is 1278230573. The reversal of 1278230528 is 8250328721.

It can be written as a sum of positive squares in only one way, i.e., 648822784 + 629407744 = 25472^2 + 25088^2 .

It is a super-2 number, since 2×1278230528² = 3267746565422317568, which contains 22 as substring.

It is a zygodrome in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 1278230491 and 1278230500.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22625 + ... + 55392.

Almost surely, 2^1278230528 is an apocalyptic number.

It is an amenable number.

1278230528 is a deficient number, since it is larger than the sum of its proper divisors (1278185278).

1278230528 is an frugal number, since it uses more digits than its factorization.

1278230528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78045 (or 78019 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 1278230528 is about 35752.3499647226. The cubic root of 1278230528 is about 1085.2664944575.

The spelling of 1278230528 in words is "one billion, two hundred seventy-eight million, two hundred thirty thousand, five hundred twenty-eight".