8128345 has 16 divisors (see below), whose sum is σ = 10218960. Its totient is φ = 6200064.

The previous prime is 8128319. The next prime is 8128357. The reversal of 8128345 is 5438218.

It can be written as a sum of positive squares in 8 ways, for example, as 751689 + 7376656 = 867^2 + 2716^2 .

It is a cyclic number.

It is not a de Polignac number, because 8128345 - 2⁷ = 8128217 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9391 + ... + 10219.

It is an arithmetic number, because the mean of its divisors is an integer number (638685).

Almost surely, 2^8128345 is an apocalyptic number.

It is an amenable number.

8128345 is a deficient number, since it is larger than the sum of its proper divisors (2090615).

8128345 is a wasteful number, since it uses less digits than its factorization.

8128345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 924.

The product of its digits is 7680, while the sum is 31.

The square root of 8128345 is about 2851.0252541849. The cubic root of 8128345 is about 201.0638725088.

The spelling of 8128345 in words is "eight million, one hundred twenty-eight thousand, three hundred forty-five".