25840655 has 8 divisors (see below), whose sum is σ = 31044384. Its totient is φ = 20648800.

The previous prime is 25840651. The next prime is 25840657. The reversal of 25840655 is 55604852.

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

It is not a de Polignac number, because 25840655 - 2² = 25840651 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 (25840651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2870 + ... + 7740.

It is an arithmetic number, because the mean of its divisors is an integer number (3880548).

Almost surely, 2^25840655 is an apocalyptic number.

25840655 is a deficient number, since it is larger than the sum of its proper divisors (5203729).

25840655 is a wasteful number, since it uses less digits than its factorization.

25840655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5937.

The product of its (nonzero) digits is 48000, while the sum is 35.

The square root of 25840655 is about 5083.3704370231. The cubic root of 25840655 is about 295.6431624883.

The spelling of 25840655 in words is "twenty-five million, eight hundred forty thousand, six hundred fifty-five".