7840345 has 8 divisors (see below), whose sum is σ = 9483264. Its totient is φ = 6222384.

The previous prime is 7840297. The next prime is 7840351. The reversal of 7840345 is 5430487.

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

It is a cyclic number.

It is not a de Polignac number, because 7840345 - 2⁹ = 7839833 is a prime.

It is a super-2 number, since 2×7840345² = 122942019438050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5539 + ... + 6808.

It is an arithmetic number, because the mean of its divisors is an integer number (1185408).

Almost surely, 2^7840345 is an apocalyptic number.

It is an amenable number.

7840345 is a deficient number, since it is larger than the sum of its proper divisors (1642919).

7840345 is a wasteful number, since it uses less digits than its factorization.

7840345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12479.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 7840345 is about 2800.0616064651. The cubic root of 7840345 is about 198.6605916169.

The spelling of 7840345 in words is "seven million, eight hundred forty thousand, three hundred forty-five".