8189640892 has 6 divisors (see below), whose sum is σ = 14331871568. Its totient is φ = 4094820444.

The previous prime is 8189640887. The next prime is 8189640929. The reversal of 8189640892 is 2980469818.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1023705108 + ... + 1023705115.

Almost surely, 2^8189640892 is an apocalyptic number.

It is an amenable number.

8189640892 is a deficient number, since it is larger than the sum of its proper divisors (6142230676).

8189640892 is a wasteful number, since it uses less digits than its factorization.

8189640892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2047410227 (or 2047410225 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 55.

The square root of 8189640892 is about 90496.6346998605. The cubic root of 8189640892 is about 2015.6801528011.

The spelling of 8189640892 in words is "eight billion, one hundred eighty-nine million, six hundred forty thousand, eight hundred ninety-two".