25685670 has 64 divisors (see below), whose sum is σ = 64696320. Its totient is φ = 6518400.

The previous prime is 25685633. The next prime is 25685713. The reversal of 25685670 is 7658652.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 65836 + ... + 66224.

It is an arithmetic number, because the mean of its divisors is an integer number (1010880).

Almost surely, 2^25685670 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25685670, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32348160).

25685670 is an abundant number, since it is smaller than the sum of its proper divisors (39010650).

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

25685670 is a wasteful number, since it uses less digits than its factorization.

25685670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501.

The product of its (nonzero) digits is 100800, while the sum is 39.

The square root of 25685670 is about 5068.1031954766. The cubic root of 25685670 is about 295.0509152758.

The spelling of 25685670 in words is "twenty-five million, six hundred eighty-five thousand, six hundred seventy".