4040345 has 8 divisors (see below), whose sum is σ = 4966920. Its totient is φ = 3153280.

The previous prime is 4040327. The next prime is 4040353. The reversal of 4040345 is 5430404.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8281 + 4032064 = 91^2 + 2008^2 .

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

It is a de Polignac number, because none of the positive numbers 2^k-4040345 is a prime.

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, 9650 + ... + 10059.

It is an arithmetic number, because the mean of its divisors is an integer number (620865).

Almost surely, 2^4040345 is an apocalyptic number.

It is an amenable number.

4040345 is a deficient number, since it is larger than the sum of its proper divisors (926575).

4040345 is a wasteful number, since it uses less digits than its factorization.

4040345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19755.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 4040345 is about 2010.0609443497. The cubic root of 4040345 is about 159.2720183109.

Adding to 4040345 its reverse (5430404), we get a palindrome (9470749).

The spelling of 4040345 in words is "four million, forty thousand, three hundred forty-five".