40944309 has 16 divisors (see below), whose sum is σ = 62576640. Its totient is φ = 23327280.

The previous prime is 40944271. The next prime is 40944341. The reversal of 40944309 is 90344904.

It is a happy number.

It is not a de Polignac number, because 40944309 - 2¹¹ = 40942261 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40944309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40944349) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4824 + ... + 10254.

It is an arithmetic number, because the mean of its divisors is an integer number (3911040).

Almost surely, 2^40944309 is an apocalyptic number.

It is an amenable number.

40944309 is a deficient number, since it is larger than the sum of its proper divisors (21632331).

40944309 is a wasteful number, since it uses less digits than its factorization.

40944309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5800.

The product of its (nonzero) digits is 15552, while the sum is 33.

The square root of 40944309 is about 6398.7740232016. The cubic root of 40944309 is about 344.6655275505.

The spelling of 40944309 in words is "forty million, nine hundred forty-four thousand, three hundred nine".