7989449895 has 48 divisors (see below), whose sum is σ = 16095006720. Its totient is φ = 3590407872.

The previous prime is 7989449869. The next prime is 7989449987. The reversal of 7989449895 is 5989449897.

7989449895 is a `hidden beast` number, since 7 + 98 + 9 + 449 + 8 + 95 = 666.

It is not a de Polignac number, because 7989449895 - 2²² = 7985255591 is a prime.

It is a super-2 number, since 2×7989449895² (a number of 21 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 47 ways as a sum of consecutive naturals, for example, 196359 + ... + 233528.

It is an arithmetic number, because the mean of its divisors is an integer number (335312640).

Almost surely, 2^7989449895 is an apocalyptic number.

7989449895 is an abundant number, since it is smaller than the sum of its proper divisors (8105556825).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7989449895 is a wasteful number, since it uses less digits than its factorization.

7989449895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429964 (or 429961 counting only the distinct ones).

The product of its digits is 235146240, while the sum is 72.

The square root of 7989449895 is about 89383.7227631519. The cubic root of 7989449895 is about 1999.1204378252.

The spelling of 7989449895 in words is "seven billion, nine hundred eighty-nine million, four hundred forty-nine thousand, eight hundred ninety-five".