40440025 has 12 divisors (see below), whose sum is σ = 53095932. Its totient is φ = 30448640.

The previous prime is 40440019. The next prime is 40440077. The reversal of 40440025 is 52004404.

It can be written as a sum of positive squares in 6 ways, for example, as 4583881 + 35856144 = 2141^2 + 5988^2 .

It is not a de Polignac number, because 40440025 - 2³ = 40440017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40439984 and 40440011.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 47152 + ... + 48001.

It is an arithmetic number, because the mean of its divisors is an integer number (4424661).

Almost surely, 2^40440025 is an apocalyptic number.

It is an amenable number.

40440025 is a deficient number, since it is larger than the sum of its proper divisors (12655907).

40440025 is a wasteful number, since it uses less digits than its factorization.

40440025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95180 (or 95175 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 40440025 is about 6359.2472038756. The cubic root of 40440025 is about 343.2446723862.

Adding to 40440025 its reverse (52004404), we get a palindrome (92444429).

The spelling of 40440025 in words is "forty million, four hundred forty thousand, twenty-five".