25648340 has 12 divisors (see below), whose sum is σ = 53861556. Its totient is φ = 10259328.

The previous prime is 25648321. The next prime is 25648351. The reversal of 25648340 is 4384652.

It can be written as a sum of positive squares in 2 ways, for example, as 11600836 + 14047504 = 3406^2 + 3748^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 25648297 and 25648306.

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, 641189 + ... + 641228.

It is an arithmetic number, because the mean of its divisors is an integer number (4488463).

Almost surely, 2^25648340 is an apocalyptic number.

25648340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25648340 is an abundant number, since it is smaller than the sum of its proper divisors (28213216).

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

25648340 is a wasteful number, since it uses less digits than its factorization.

25648340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282426 (or 1282424 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 25648340 is about 5064.4190189991. The cubic root of 25648340 is about 294.9079095869.

The spelling of 25648340 in words is "twenty-five million, six hundred forty-eight thousand, three hundred forty".