25640230 has 96 divisors (see below), whose sum is σ = 60279552. Its totient is φ = 7761600.

The previous prime is 25640227. The next prime is 25640249. The reversal of 25640230 is 3204652.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

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 47 ways as a sum of consecutive naturals, for example, 361095 + ... + 361165.

It is an arithmetic number, because the mean of its divisors is an integer number (627912).

Almost surely, 2^25640230 is an apocalyptic number.

25640230 is an abundant number, since it is smaller than the sum of its proper divisors (34639322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25640230 is a wasteful number, since it uses less digits than its factorization.

25640230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 25640230 is about 5063.6182715525. The cubic root of 25640230 is about 294.8768230361.

Adding to 25640230 its reverse (3204652), we get a palindrome (28844882).

The spelling of 25640230 in words is "twenty-five million, six hundred forty thousand, two hundred thirty".