25640335 has 16 divisors (see below), whose sum is σ = 37233216. Its totient is φ = 16547328.

The previous prime is 25640311. The next prime is 25640339. The reversal of 25640335 is 53304652.

It is not a de Polignac number, because 25640335 - 2⁷ = 25640207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25640339) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20952 + ... + 22141.

It is an arithmetic number, because the mean of its divisors is an integer number (2327076).

Almost surely, 2^25640335 is an apocalyptic number.

25640335 is a deficient number, since it is larger than the sum of its proper divisors (11592881).

25640335 is a wasteful number, since it uses less digits than its factorization.

25640335 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43122.

The product of its (nonzero) digits is 10800, while the sum is 28.

The square root of 25640335 is about 5063.6286396220. The cubic root of 25640335 is about 294.8772255549.

Adding to 25640335 its reverse (53304652), we get a palindrome (78944987).

The spelling of 25640335 in words is "twenty-five million, six hundred forty thousand, three hundred thirty-five".