1283796865 has 32 divisors (see below), whose sum is σ = 1738920960. Its totient is φ = 902770176.

The previous prime is 1283796827. The next prime is 1283796887. The reversal of 1283796865 is 5686973821.

It is a cyclic number.

It is not a de Polignac number, because 1283796865 - 2¹³ = 1283788673 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 355509 + ... + 359101.

It is an arithmetic number, because the mean of its divisors is an integer number (54341280).

Almost surely, 2^1283796865 is an apocalyptic number.

It is an amenable number.

1283796865 is a deficient number, since it is larger than the sum of its proper divisors (455124095).

1283796865 is a wasteful number, since it uses less digits than its factorization.

1283796865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3873.

The product of its digits is 4354560, while the sum is 55.

The square root of 1283796865 is about 35830.1111497020. Note that the first 4 decimals coincide. The cubic root of 1283796865 is about 1086.8395574190.

The spelling of 1283796865 in words is "one billion, two hundred eighty-three million, seven hundred ninety-six thousand, eight hundred sixty-five".