40840025 has 24 divisors (see below), whose sum is σ = 53806080. Its totient is φ = 30663360.

The previous prime is 40840021. The next prime is 40840027. The reversal of 40840025 is 52004804.

It is not a de Polignac number, because 40840025 - 2² = 40840021 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40840021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59987 + ... + 60663.

It is an arithmetic number, because the mean of its divisors is an integer number (2241920).

Almost surely, 2^40840025 is an apocalyptic number.

It is an amenable number.

40840025 is a deficient number, since it is larger than the sum of its proper divisors (12966055).

40840025 is a wasteful number, since it uses less digits than its factorization.

40840025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 833 (or 828 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 40840025 is about 6390.6200794602. The cubic root of 40840025 is about 344.3726609767.

Adding to 40840025 its reverse (52004804), we get a palindrome (92844829).

The spelling of 40840025 in words is "forty million, eight hundred forty thousand, twenty-five".