7887239746928 has 20 divisors (see below), whose sum is σ = 15281581422888. Its totient is φ = 3943605831360.

The previous prime is 7887239746909. The next prime is 7887239746973. The reversal of 7887239746928 is 8296479327887.

It is a Cunningham number, because it is equal to 2808423²-1.

It is a super-2 number, since 2×7887239746928² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4914743 + ... + 6318953.

Almost surely, 2^{7887239746928} is an apocalyptic number.

It is an amenable number.

7887239746928 is a deficient number, since it is larger than the sum of its proper divisors (7394341675960).

7887239746928 is a wasteful number, since it uses less digits than its factorization.

7887239746928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1755272 (or 1755266 counting only the distinct ones).

The product of its digits is 4096770048, while the sum is 80.

The spelling of 7887239746928 in words is "seven trillion, eight hundred eighty-seven billion, two hundred thirty-nine million, seven hundred forty-six thousand, nine hundred twenty-eight".