40309441 has 4 divisors (see below), whose sum is σ = 40322772. Its totient is φ = 40296112.

The previous prime is 40309439. The next prime is 40309453. The reversal of 40309441 is 14490304.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5452225 + 34857216 = 2335^2 + 5904^2 .

It is a cyclic number.

It is not a de Polignac number, because 40309441 - 2¹ = 40309439 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40309421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 291 + ... + 8983.

It is an arithmetic number, because the mean of its divisors is an integer number (10080693).

Almost surely, 2^40309441 is an apocalyptic number.

It is an amenable number.

40309441 is a deficient number, since it is larger than the sum of its proper divisors (13331).

40309441 is an equidigital number, since it uses as much as digits as its factorization.

40309441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13330.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 40309441 is about 6348.9716490153. The cubic root of 40309441 is about 342.8748193846.

Adding to 40309441 its reverse (14490304), we get a palindrome (54799745).

The spelling of 40309441 in words is "forty million, three hundred nine thousand, four hundred forty-one".