1283257768 has 32 divisors (see below), whose sum is σ = 2703859200. Its totient is φ = 566520768.

The previous prime is 1283257753. The next prime is 1283257817. The reversal of 1283257768 is 8677523821.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 265848 + ... + 270631.

It is an arithmetic number, because the mean of its divisors is an integer number (84495600).

Almost surely, 2^1283257768 is an apocalyptic number.

It is an amenable number.

1283257768 is an abundant number, since it is smaller than the sum of its proper divisors (1420601432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1283257768 is a wasteful number, since it uses less digits than its factorization.

1283257768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536521 (or 536517 counting only the distinct ones).

The product of its digits is 1128960, while the sum is 49.

The square root of 1283257768 is about 35822.5873995724. The cubic root of 1283257768 is about 1086.6874061473.

The spelling of 1283257768 in words is "one billion, two hundred eighty-three million, two hundred fifty-seven thousand, seven hundred sixty-eight".