1288281768 has 16 divisors (see below), whose sum is σ = 3220704480. Its totient is φ = 429427248.

The previous prime is 1288281767. The next prime is 1288281769. The reversal of 1288281768 is 8671828821.

It is an interprime number because it is at equal distance from previous prime (1288281767) and next prime (1288281769).

It is a super-2 number, since 2×1288281768² = 3319339827522411648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1288281768.

It is not an unprimeable number, because it can be changed into a prime (1288281767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26839180 + ... + 26839227.

It is an arithmetic number, because the mean of its divisors is an integer number (201294030).

Almost surely, 2^1288281768 is an apocalyptic number.

It is an amenable number.

1288281768 is an abundant number, since it is smaller than the sum of its proper divisors (1932422712).

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

1288281768 is a wasteful number, since it uses less digits than its factorization.

1288281768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53678416 (or 53678412 counting only the distinct ones).

The product of its digits is 688128, while the sum is 51.

The square root of 1288281768 is about 35892.6422543674. The cubic root of 1288281768 is about 1088.1036994765.

The spelling of 1288281768 in words is "one billion, two hundred eighty-eight million, two hundred eighty-one thousand, seven hundred sixty-eight".