40956309 has 6 divisors (see below), whose sum is σ = 59159126. Its totient is φ = 27304200.

The previous prime is 40956277. The next prime is 40956313. The reversal of 40956309 is 90365904.

40956309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 25979409 + 14976900 = 5097^2 + 3870^2 .

It is not a de Polignac number, because 40956309 - 2⁵ = 40956277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40956329) 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 5 ways as a sum of consecutive naturals, for example, 2275342 + ... + 2275359.

Almost surely, 2^40956309 is an apocalyptic number.

It is an amenable number.

40956309 is a deficient number, since it is larger than the sum of its proper divisors (18202817).

40956309 is a wasteful number, since it uses less digits than its factorization.

40956309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4550707 (or 4550704 counting only the distinct ones).

The product of its (nonzero) digits is 29160, while the sum is 36.

The square root of 40956309 is about 6399.7116341285. The cubic root of 40956309 is about 344.6991959034.

It can be divided in two parts, 4095 and 6309, that added together give a square (10404 = 102²).

The spelling of 40956309 in words is "forty million, nine hundred fifty-six thousand, three hundred nine".