1288767855 has 32 divisors (see below), whose sum is σ = 2154760704. Its totient is φ = 656518016.

The previous prime is 1288767839. The next prime is 1288767863. The reversal of 1288767855 is 5587678821.

It is a cyclic number.

It is not a de Polignac number, because 1288767855 - 2⁴ = 1288767839 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1288767795 and 1288767804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283057 + ... + 287573.

It is an arithmetic number, because the mean of its divisors is an integer number (67336272).

Almost surely, 2^1288767855 is an apocalyptic number.

1288767855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1288767855 is a deficient number, since it is larger than the sum of its proper divisors (865992849).

1288767855 is a wasteful number, since it uses less digits than its factorization.

1288767855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5375.

The product of its digits is 7526400, while the sum is 57.

The square root of 1288767855 is about 35899.4130174854. The cubic root of 1288767855 is about 1088.2405345923.

The spelling of 1288767855 in words is "one billion, two hundred eighty-eight million, seven hundred sixty-seven thousand, eight hundred fifty-five".