40440425 has 12 divisors (see below), whose sum is σ = 51313680. Its totient is φ = 31599120.

The previous prime is 40440419. The next prime is 40440451. The reversal of 40440425 is 52404404.

It is not a de Polignac number, because 40440425 - 2¹⁶ = 40374889 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40440425.

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, 17735 + ... + 19884.

It is an arithmetic number, because the mean of its divisors is an integer number (4276140).

Almost surely, 2^40440425 is an apocalyptic number.

It is an amenable number.

40440425 is a deficient number, since it is larger than the sum of its proper divisors (10873255).

40440425 is a wasteful number, since it uses less digits than its factorization.

40440425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37672 (or 37667 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 40440425 is about 6359.2786540613. The cubic root of 40440425 is about 343.2458040820.

Adding to 40440425 its reverse (52404404), we get a palindrome (92844829).

The spelling of 40440425 in words is "forty million, four hundred forty thousand, four hundred twenty-five".