1288285660 has 24 divisors (see below), whose sum is σ = 2823026976. Its totient is φ = 492909120.

The previous prime is 1288285597. The next prime is 1288285667. The reversal of 1288285660 is 665828821.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a self number, because there is not a number n which added to its sum of digits gives 1288285660.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288285667) 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 7 ways as a sum of consecutive naturals, for example, 1399851 + ... + 1400770.

It is an arithmetic number, because the mean of its divisors is an integer number (117626124).

Almost surely, 2^1288285660 is an apocalyptic number.

1288285660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1288285660 is an abundant number, since it is smaller than the sum of its proper divisors (1534741316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1288285660 is a wasteful number, since it uses less digits than its factorization.

1288285660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2800653 (or 2800651 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 46.

The square root of 1288285660 is about 35892.6964715665. The cubic root of 1288285660 is about 1088.1047952242.

The spelling of 1288285660 in words is "one billion, two hundred eighty-eight million, two hundred eighty-five thousand, six hundred sixty".