7987743964 has 48 divisors (see below), whose sum is σ = 15236296992. Its totient is φ = 3648817152.

The previous prime is 7987743949. The next prime is 7987743989. The reversal of 7987743964 is 4693477897.

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 7987743896 and 7987743905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1146339 + ... + 1153285.

It is an arithmetic number, because the mean of its divisors is an integer number (317422854).

Almost surely, 2^7987743964 is an apocalyptic number.

7987743964 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

7987743964 is a deficient number, since it is larger than the sum of its proper divisors (7248553028).

7987743964 is a wasteful number, since it uses less digits than its factorization.

7987743964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7462 (or 7460 counting only the distinct ones).

The product of its digits is 64012032, while the sum is 64.

The square root of 7987743964 is about 89374.1795151150. The cubic root of 7987743964 is about 1998.9781416583.

The spelling of 7987743964 in words is "seven billion, nine hundred eighty-seven million, seven hundred forty-three thousand, nine hundred sixty-four".