7440345 has 24 divisors (see below), whose sum is σ = 14069952. Its totient is φ = 3607200.

The previous prime is 7440319. The next prime is 7440347. The reversal of 7440345 is 5430447.

It is not a de Polignac number, because 7440345 - 2⁸ = 7440089 is a prime.

7440345 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (7440347) 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 23 ways as a sum of consecutive naturals, for example, 7021 + ... + 8010.

It is an arithmetic number, because the mean of its divisors is an integer number (586248).

Almost surely, 2^7440345 is an apocalyptic number.

It is an amenable number.

7440345 is a deficient number, since it is larger than the sum of its proper divisors (6629607).

7440345 is a wasteful number, since it uses less digits than its factorization.

7440345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15053 (or 15050 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 27.

The square root of 7440345 is about 2727.6995802324. The cubic root of 7440345 is about 195.2230190005.

The spelling of 7440345 in words is "seven million, four hundred forty thousand, three hundred forty-five".