8128443490 has 8 divisors (see below), whose sum is σ = 14631198300. Its totient is φ = 3251377392.

The previous prime is 8128443469. The next prime is 8128443541. The reversal of 8128443490 is 943448218.

It can be written as a sum of positive squares in 2 ways, for example, as 7896277321 + 232166169 = 88861^2 + 15237^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 406422165 + ... + 406422184.

Almost surely, 2^8128443490 is an apocalyptic number.

8128443490 is a deficient number, since it is larger than the sum of its proper divisors (6502754810).

8128443490 is a wasteful number, since it uses less digits than its factorization.

8128443490 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 812844356.

The product of its (nonzero) digits is 221184, while the sum is 43.

The square root of 8128443490 is about 90157.8809089921. The cubic root of 8128443490 is about 2010.6468459295.

The spelling of 8128443490 in words is "eight billion, one hundred twenty-eight million, four hundred forty-three thousand, four hundred ninety".