1272808528 has 10 divisors (see below), whose sum is σ = 2466066554. Its totient is φ = 636404256.

The previous prime is 1272808429. The next prime is 1272808583. The reversal of 1272808528 is 8258082721.

It can be written as a sum of positive squares in only one way, i.e., 789160464 + 483648064 = 28092^2 + 21992^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39775251 + ... + 39775282.

Almost surely, 2^1272808528 is an apocalyptic number.

It is an amenable number.

1272808528 is a deficient number, since it is larger than the sum of its proper divisors (1193258026).

1272808528 is an equidigital number, since it uses as much as digits as its factorization.

1272808528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79550541 (or 79550535 counting only the distinct ones).

The product of its (nonzero) digits is 143360, while the sum is 43.

The square root of 1272808528 is about 35676.4421993001. The cubic root of 1272808528 is about 1083.7298246895.

The spelling of 1272808528 in words is "one billion, two hundred seventy-two million, eight hundred eight thousand, five hundred twenty-eight".