1288407887 has 4 divisors (see below), whose sum is σ = 1387516200. Its totient is φ = 1189299576.

The previous prime is 1288407829. The next prime is 1288407893. The reversal of 1288407887 is 7887048821.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1288407887 - 2⁶ = 1288407823 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 (1288407817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49554137 + ... + 49554162.

It is an arithmetic number, because the mean of its divisors is an integer number (346879050).

Almost surely, 2^1288407887 is an apocalyptic number.

1288407887 is a deficient number, since it is larger than the sum of its proper divisors (99108313).

1288407887 is an equidigital number, since it uses as much as digits as its factorization.

1288407887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99108312.

The product of its (nonzero) digits is 1605632, while the sum is 53.

The square root of 1288407887 is about 35894.3991034813. The cubic root of 1288407887 is about 1088.1392057029.

The spelling of 1288407887 in words is "one billion, two hundred eighty-eight million, four hundred seven thousand, eight hundred eighty-seven".