8128443487 has 4 divisors (see below), whose sum is σ = 8160827976. Its totient is φ = 8096059000.

The previous prime is 8128443469. The next prime is 8128443541. The reversal of 8128443487 is 7843448218.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8128443487 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8128443487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8128440487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16191868 + ... + 16192369.

It is an arithmetic number, because the mean of its divisors is an integer number (2040206994).

Almost surely, 2^8128443487 is an apocalyptic number.

8128443487 is a deficient number, since it is larger than the sum of its proper divisors (32384489).

8128443487 is a wasteful number, since it uses less digits than its factorization.

8128443487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32384488.

The product of its digits is 1376256, while the sum is 49.

The square root of 8128443487 is about 90157.8808923546. The cubic root of 8128443487 is about 2010.6468456821.

The spelling of 8128443487 in words is "eight billion, one hundred twenty-eight million, four hundred forty-three thousand, four hundred eighty-seven".