8330405 has 4 divisors (see below), whose sum is σ = 9996492. Its totient is φ = 6664320.

The previous prime is 8330401. The next prime is 8330407. The reversal of 8330405 is 5040338.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5040338 = 2 ⋅2520169.

It can be written as a sum of positive squares in 2 ways, for example, as 1560001 + 6770404 = 1249^2 + 2602^2 .

It is not a de Polignac number, because 8330405 - 2² = 8330401 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8330401) 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, 833036 + ... + 833045.

It is an arithmetic number, because the mean of its divisors is an integer number (2499123).

Almost surely, 2^8330405 is an apocalyptic number.

It is an amenable number.

8330405 is a deficient number, since it is larger than the sum of its proper divisors (1666087).

8330405 is a wasteful number, since it uses less digits than its factorization.

8330405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1666086.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 8330405 is about 2886.2440991711. The cubic root of 8330405 is about 202.7163161171.

The spelling of 8330405 in words is "eight million, three hundred thirty thousand, four hundred five".