1278922833 has 12 divisors (see below), whose sum is σ = 1864282420. Its totient is φ = 844792416.

The previous prime is 1278922831. The next prime is 1278922859. The reversal of 1278922833 is 3382298721.

It can be written as a sum of positive squares in 2 ways, for example, as 1109089809 + 169833024 = 33303^2 + 13032^2 .

It is not a de Polignac number, because 1278922833 - 2¹ = 1278922831 is a prime.

It is a super-2 number, since 2×1278922833² = 3271287225537491778, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1278922831) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 650866 + ... + 652827.

Almost surely, 2^1278922833 is an apocalyptic number.

It is an amenable number.

1278922833 is a deficient number, since it is larger than the sum of its proper divisors (585359587).

1278922833 is a wasteful number, since it uses less digits than its factorization.

1278922833 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303808 (or 1303805 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 1278922833 is about 35762.0306050985. The cubic root of 1278922833 is about 1085.4623902162.

The spelling of 1278922833 in words is "one billion, two hundred seventy-eight million, nine hundred twenty-two thousand, eight hundred thirty-three".