25755630 has 64 divisors (see below), whose sum is σ = 65180160. Its totient is φ = 6500736.

The previous prime is 25755619. The next prime is 25755661. The reversal of 25755630 is 3655752.

25755630 = 2536² + 2537² + ... + 2539².

It is a junction number, because it is equal to n+sod(n) for n = 25755591 and 25755600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 112356 + ... + 112584.

It is an arithmetic number, because the mean of its divisors is an integer number (1018440).

Almost surely, 2^25755630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25755630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32590080).

25755630 is an abundant number, since it is smaller than the sum of its proper divisors (39424530).

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

25755630 is a wasteful number, since it uses less digits than its factorization.

25755630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425.

The product of its (nonzero) digits is 31500, while the sum is 33.

The square root of 25755630 is about 5075.0004926108. Note that the first 3 decimals coincide. The cubic root of 25755630 is about 295.3185489369.

The spelling of 25755630 in words is "twenty-five million, seven hundred fifty-five thousand, six hundred thirty".