1288860285 has 16 divisors (see below), whose sum is σ = 2110135104. Its totient is φ = 671405952.

The previous prime is 1288860283. The next prime is 1288860289. The reversal of 1288860285 is 5820688821.

It is a happy number.

It is not a de Polignac number, because 1288860285 - 2¹ = 1288860283 is a prime.

It is a super-2 number, since 2×1288860285² = 3322321668500562450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288860283) 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 15 ways as a sum of consecutive naturals, for example, 998472 + ... + 999761.

It is an arithmetic number, because the mean of its divisors is an integer number (131883444).

Almost surely, 2^1288860285 is an apocalyptic number.

1288860285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1288860285 is a deficient number, since it is larger than the sum of its proper divisors (821274819).

1288860285 is a wasteful number, since it uses less digits than its factorization.

1288860285 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1998284.

The product of its (nonzero) digits is 491520, while the sum is 48.

The square root of 1288860285 is about 35900.7003413582. The cubic root of 1288860285 is about 1088.2665500529.

The spelling of 1288860285 in words is "one billion, two hundred eighty-eight million, eight hundred sixty thousand, two hundred eighty-five".