1288813823 has 8 divisors (see below), whose sum is σ = 1419120000. Its totient is φ = 1160697880.

The previous prime is 1288813787. The next prime is 1288813847. The reversal of 1288813823 is 3283188821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1288813823 - 2¹⁸ = 1288551679 is a prime.

It is a super-2 number, since 2×1288813823² = 3322082140711750658, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1288813873) 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, 546323 + ... + 548676.

It is an arithmetic number, because the mean of its divisors is an integer number (177390000).

Almost surely, 2^1288813823 is an apocalyptic number.

1288813823 is a deficient number, since it is larger than the sum of its proper divisors (130306177).

1288813823 is a wasteful number, since it uses less digits than its factorization.

1288813823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1095117.

The product of its digits is 147456, while the sum is 44.

The square root of 1288813823 is about 35900.0532450859. The cubic root of 1288813823 is about 1088.2534729571.

The spelling of 1288813823 in words is "one billion, two hundred eighty-eight million, eight hundred thirteen thousand, eight hundred twenty-three".