25640326 has 8 divisors (see below), whose sum is σ = 38484144. Its totient is φ = 12812280.

The previous prime is 25640311. The next prime is 25640339. The reversal of 25640326 is 62304652.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 25640294 and 25640303.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1791 + ... + 7381.

It is an arithmetic number, because the mean of its divisors is an integer number (4810518).

Almost surely, 2^25640326 is an apocalyptic number.

25640326 is a deficient number, since it is larger than the sum of its proper divisors (12843818).

25640326 is a wasteful number, since it uses less digits than its factorization.

25640326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7886.

The product of its (nonzero) digits is 8640, while the sum is 28.

The square root of 25640326 is about 5063.6277509311. The cubic root of 25640326 is about 294.8771910533.

Adding to 25640326 its reverse (62304652), we get a palindrome (87944978).

The spelling of 25640326 in words is "twenty-five million, six hundred forty thousand, three hundred twenty-six".