1288767879 has 24 divisors (see below), whose sum is σ = 2129386272. Its totient is φ = 735782400.

The previous prime is 1288767863. The next prime is 1288767881. The reversal of 1288767879 is 9787678821.

It is not a de Polignac number, because 1288767879 - 2⁴ = 1288767863 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288767839) 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 23 ways as a sum of consecutive naturals, for example, 67147 + ... + 84179.

It is an arithmetic number, because the mean of its divisors is an integer number (88724428).

Almost surely, 2^1288767879 is an apocalyptic number.

1288767879 is a deficient number, since it is larger than the sum of its proper divisors (840618393).

1288767879 is a wasteful number, since it uses less digits than its factorization.

1288767879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18247 (or 18244 counting only the distinct ones).

The product of its digits is 18966528, while the sum is 63.

The square root of 1288767879 is about 35899.4133517527. The cubic root of 1288767879 is about 1088.2405413475.

The spelling of 1288767879 in words is "one billion, two hundred eighty-eight million, seven hundred sixty-seven thousand, eight hundred seventy-nine".