25669340 has 24 divisors (see below), whose sum is σ = 54667872. Its totient is φ = 10122560.

The previous prime is 25669339. The next prime is 25669373. The reversal of 25669340 is 4396652.

It is a self number, because there is not a number n which added to its sum of digits gives 25669340.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7619 + ... + 10458.

It is an arithmetic number, because the mean of its divisors is an integer number (2277828).

Almost surely, 2^25669340 is an apocalyptic number.

25669340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25669340 is an abundant number, since it is smaller than the sum of its proper divisors (28998532).

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

25669340 is a wasteful number, since it uses less digits than its factorization.

25669340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18157 (or 18155 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 25669340 is about 5066.4918829502. The cubic root of 25669340 is about 294.9883745299.

It can be divided in two parts, 256 and 69340, that added together give a palindrome (69596).

The spelling of 25669340 in words is "twenty-five million, six hundred sixty-nine thousand, three hundred forty".