25705550 has 48 divisors (see below), whose sum is σ = 52309152. Its totient is φ = 9340800.

The previous prime is 25705543. The next prime is 25705553. The reversal of 25705550 is 5550752.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25705553) 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 23 ways as a sum of consecutive naturals, for example, 45872 + ... + 46428.

It is an arithmetic number, because the mean of its divisors is an integer number (1089774).

Almost surely, 2^25705550 is an apocalyptic number.

25705550 is an abundant number, since it is smaller than the sum of its proper divisors (26603602).

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

25705550 is a wasteful number, since it uses less digits than its factorization.

25705550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653 (or 648 counting only the distinct ones).

The product of its (nonzero) digits is 8750, while the sum is 29.

The square root of 25705550 is about 5070.0641021589. The cubic root of 25705550 is about 295.1270160688.

The spelling of 25705550 in words is "twenty-five million, seven hundred five thousand, five hundred fifty".