40444385 has 4 divisors (see below), whose sum is σ = 48533268. Its totient is φ = 32355504.

The previous prime is 40444361. The next prime is 40444387. The reversal of 40444385 is 58344404.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22202944 + 18241441 = 4712^2 + 4271^2 .

It is a cyclic number.

It is not a de Polignac number, because 40444385 - 2⁶ = 40444321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40444387) 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, 4044434 + ... + 4044443.

It is an arithmetic number, because the mean of its divisors is an integer number (12133317).

Almost surely, 2^40444385 is an apocalyptic number.

It is an amenable number.

40444385 is a deficient number, since it is larger than the sum of its proper divisors (8088883).

40444385 is an equidigital number, since it uses as much as digits as its factorization.

40444385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8088882.

The product of its (nonzero) digits is 30720, while the sum is 32.

The square root of 40444385 is about 6359.5900025080. The cubic root of 40444385 is about 343.2570074676.

Adding to 40444385 its reverse (58344404), we get a palindrome (98788789).

The spelling of 40444385 in words is "forty million, four hundred forty-four thousand, three hundred eighty-five".