25655730 has 16 divisors (see below), whose sum is σ = 61573824. Its totient is φ = 6841520.

The previous prime is 25655699. The next prime is 25655731. The reversal of 25655730 is 3755652.

It is a junction number, because it is equal to n+sod(n) for n = 25655691 and 25655700.

It is not an unprimeable number, because it can be changed into a prime (25655731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 427566 + ... + 427625.

It is an arithmetic number, because the mean of its divisors is an integer number (3848364).

Almost surely, 2^25655730 is an apocalyptic number.

25655730 is an abundant number, since it is smaller than the sum of its proper divisors (35918094).

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

25655730 is a wasteful number, since it uses less digits than its factorization.

25655730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855201.

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

The square root of 25655730 is about 5065.1485664292. The cubic root of 25655730 is about 294.9362305903.

The spelling of 25655730 in words is "twenty-five million, six hundred fifty-five thousand, seven hundred thirty".