1286878089 has 16 divisors (see below), whose sum is σ = 1978951040. Its totient is φ = 728611200.

The previous prime is 1286878069. The next prime is 1286878123. The reversal of 1286878089 is 9808786821.

It is not a de Polignac number, because 1286878089 - 2⁵ = 1286878057 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1286878049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 278812 + ... + 283389.

It is an arithmetic number, because the mean of its divisors is an integer number (123684440).

Almost surely, 2^1286878089 is an apocalyptic number.

It is an amenable number.

1286878089 is a deficient number, since it is larger than the sum of its proper divisors (692072951).

1286878089 is a wasteful number, since it uses less digits than its factorization.

1286878089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 562320.

The product of its (nonzero) digits is 3096576, while the sum is 57.

The square root of 1286878089 is about 35873.0830707370. The cubic root of 1286878089 is about 1087.7083658347.

The spelling of 1286878089 in words is "one billion, two hundred eighty-six million, eight hundred seventy-eight thousand, eighty-nine".