1288764039 has 8 divisors (see below), whose sum is σ = 1718551552. Its totient is φ = 859076280.

The previous prime is 1288764013. The next prime is 1288764049. The reversal of 1288764039 is 9304678821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1288764039 - 2⁷ = 1288763911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288764049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13812 + ... + 52614.

It is an arithmetic number, because the mean of its divisors is an integer number (214818944).

Almost surely, 2^1288764039 is an apocalyptic number.

1288764039 is a deficient number, since it is larger than the sum of its proper divisors (429787513).

1288764039 is a wasteful number, since it uses less digits than its factorization.

1288764039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49877.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 1288764039 is about 35899.3598689447. The cubic root of 1288764039 is about 1088.2394605095.

The spelling of 1288764039 in words is "one billion, two hundred eighty-eight million, seven hundred sixty-four thousand, thirty-nine".