1288640105428 has 24 divisors (see below), whose sum is σ = 2430264846240. Its totient is φ = 594347042400.

The previous prime is 1288640105377. The next prime is 1288640105443. The reversal of 1288640105428 is 8245010468821.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8464018 + ... + 8614921.

It is an arithmetic number, because the mean of its divisors is an integer number (101261035260).

Almost surely, 2^{1288640105428} is an apocalyptic number.

It is an amenable number.

1288640105428 is a deficient number, since it is larger than the sum of its proper divisors (1141624740812).

1288640105428 is a wasteful number, since it uses less digits than its factorization.

1288640105428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17080407 (or 17080405 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 49.

The spelling of 1288640105428 in words is "one trillion, two hundred eighty-eight billion, six hundred forty million, one hundred five thousand, four hundred twenty-eight".