1288535530 has 16 divisors (see below), whose sum is σ = 2320906464. Its totient is φ = 515071440.

The previous prime is 1288535473. The next prime is 1288535533. The reversal of 1288535530 is 355358821.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1288535533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26772 + ... + 57391.

It is an arithmetic number, because the mean of its divisors is an integer number (145056654).

Almost surely, 2^1288535530 is an apocalyptic number.

1288535530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1288535530 is a deficient number, since it is larger than the sum of its proper divisors (1032370934).

1288535530 is a wasteful number, since it uses less digits than its factorization.

1288535530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85701.

The product of its (nonzero) digits is 144000, while the sum is 40.

The square root of 1288535530 is about 35896.1770945041. The cubic root of 1288535530 is about 1088.1751386212.

The spelling of 1288535530 in words is "one billion, two hundred eighty-eight million, five hundred thirty-five thousand, five hundred thirty".