1288681748 has 12 divisors (see below), whose sum is σ = 2269558452. Its totient is φ = 640236480.

The previous prime is 1288681739. The next prime is 1288681777. The reversal of 1288681748 is 8471868821.

It can be written as a sum of positive squares in 2 ways, for example, as 914336644 + 374345104 = 30238^2 + 19348^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1288681748.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1025393 + ... + 1026648.

It is an arithmetic number, because the mean of its divisors is an integer number (189129871).

Almost surely, 2^1288681748 is an apocalyptic number.

It is an amenable number.

1288681748 is a deficient number, since it is larger than the sum of its proper divisors (980876704).

1288681748 is a wasteful number, since it uses less digits than its factorization.

1288681748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2052202 (or 2052200 counting only the distinct ones).

The product of its digits is 1376256, while the sum is 53.

The square root of 1288681748 is about 35898.2137160054. The cubic root of 1288681748 is about 1088.2162976918.

The spelling of 1288681748 in words is "one billion, two hundred eighty-eight million, six hundred eighty-one thousand, seven hundred forty-eight".