7940345 has 16 divisors (see below), whose sum is σ = 11266560. Its totient is φ = 5256384.

The previous prime is 7940341. The next prime is 7940353. The reversal of 7940345 is 5430497.

It is not a de Polignac number, because 7940345 - 2² = 7940341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7940341) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 2897 + ... + 4926.

It is an arithmetic number, because the mean of its divisors is an integer number (704160).

Almost surely, 2^7940345 is an apocalyptic number.

It is an amenable number.

7940345 is a deficient number, since it is larger than the sum of its proper divisors (3326215).

7940345 is a wasteful number, since it uses less digits than its factorization.

7940345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7864.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 7940345 is about 2817.8617780154. The cubic root of 7940345 is about 199.5016341891.

The spelling of 7940345 in words is "seven million, nine hundred forty thousand, three hundred forty-five".