1288538823 has 32 divisors (see below), whose sum is σ = 2027612160. Its totient is φ = 717575040.

The previous prime is 1288538791. The next prime is 1288538837. The reversal of 1288538823 is 3288358821.

It is not a de Polignac number, because 1288538823 - 2⁵ = 1288538791 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288538843) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 88933 + ... + 102401.

It is an arithmetic number, because the mean of its divisors is an integer number (63362880).

Almost surely, 2^1288538823 is an apocalyptic number.

1288538823 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1288538823 is a deficient number, since it is larger than the sum of its proper divisors (739073337).

1288538823 is a wasteful number, since it uses less digits than its factorization.

1288538823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13719.

The product of its digits is 737280, while the sum is 48.

The square root of 1288538823 is about 35896.2229628689. Note that the first 3 decimals coincide. The cubic root of 1288538823 is about 1088.1760656058.

The spelling of 1288538823 in words is "one billion, two hundred eighty-eight million, five hundred thirty-eight thousand, eight hundred twenty-three".