7888981964 has 12 divisors (see below), whose sum is σ = 13806357600. Its totient is φ = 3944308368.

The previous prime is 7888981939. The next prime is 7888981979. The reversal of 7888981964 is 4691898887.

It is a junction number, because it is equal to n+sod(n) for n = 7888981894 and 7888981903.

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, 112157 + ... + 168395.

It is an arithmetic number, because the mean of its divisors is an integer number (1150529800).

Almost surely, 2^7888981964 is an apocalyptic number.

It is an amenable number.

7888981964 is a deficient number, since it is larger than the sum of its proper divisors (5917375636).

7888981964 is a wasteful number, since it uses less digits than its factorization.

7888981964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91312 (or 91310 counting only the distinct ones).

The product of its digits is 55738368, while the sum is 68.

The square root of 7888981964 is about 88819.9412519508. The cubic root of 7888981964 is about 1990.7053688294.

The spelling of 7888981964 in words is "seven billion, eight hundred eighty-eight million, nine hundred eighty-one thousand, nine hundred sixty-four".