1288136090 has 16 divisors (see below), whose sum is σ = 2327269320. Its totient is φ = 513337920.

The previous prime is 1288136077. The next prime is 1288136099. The reversal of 1288136090 is 906318821.

It can be written as a sum of positive squares in 4 ways, for example, as 532271041 + 755865049 = 23071^2 + 27493^2 .

It is not an unprimeable number, because it can be changed into a prime (1288136099) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236741 + ... + 242120.

Almost surely, 2^1288136090 is an apocalyptic number.

1288136090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1288136090 is a deficient number, since it is larger than the sum of its proper divisors (1039133230).

1288136090 is a wasteful number, since it uses less digits than its factorization.

1288136090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479137.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 1288136090 is about 35890.6128395713. The cubic root of 1288136090 is about 1088.0626839290.

The spelling of 1288136090 in words is "one billion, two hundred eighty-eight million, one hundred thirty-six thousand, ninety".