40343505 has 32 divisors (see below), whose sum is σ = 66860544. Its totient is φ = 20756736.

The previous prime is 40343461. The next prime is 40343519. The reversal of 40343505 is 50534304.

It is a happy number.

It is not a de Polignac number, because 40343505 - 2¹⁰ = 40342481 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 86904 + ... + 87366.

It is an arithmetic number, because the mean of its divisors is an integer number (2089392).

Almost surely, 2^40343505 is an apocalyptic number.

It is an amenable number.

40343505 is a deficient number, since it is larger than the sum of its proper divisors (26517039).

40343505 is a wasteful number, since it uses less digits than its factorization.

40343505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665.

The product of its (nonzero) digits is 3600, while the sum is 24.

The square root of 40343505 is about 6351.6537216697. The cubic root of 40343505 is about 342.9713757502.

Adding to 40343505 its reverse (50534304), we get a palindrome (90877809).

The spelling of 40343505 in words is "forty million, three hundred forty-three thousand, five hundred five".