8891947388 has 24 divisors (see below), whose sum is σ = 15610501872. Its totient is φ = 4431824384.

The previous prime is 8891947381. The next prime is 8891947423. The reversal of 8891947388 is 8837491988.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8891947381) 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, 3005606 + ... + 3008562.

It is an arithmetic number, because the mean of its divisors is an integer number (650437578).

Almost surely, 2^8891947388 is an apocalyptic number.

It is an amenable number.

8891947388 is a deficient number, since it is larger than the sum of its proper divisors (6718554484).

8891947388 is a wasteful number, since it uses less digits than its factorization.

8891947388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101 (or 5099 counting only the distinct ones).

The product of its digits is 27869184, while the sum is 65.

The square root of 8891947388 is about 94297.1229041480. The cubic root of 8891947388 is about 2071.7258967545.

The spelling of 8891947388 in words is "eight billion, eight hundred ninety-one million, nine hundred forty-seven thousand, three hundred eighty-eight".