25684830 has 64 divisors (see below), whose sum is σ = 68947200. Its totient is φ = 6804000.

The previous prime is 25684829. The next prime is 25684847. The reversal of 25684830 is 3848652.

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, 67581 + ... + 67959.

It is an arithmetic number, because the mean of its divisors is an integer number (1077300).

Almost surely, 2^25684830 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25684830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34473600).

25684830 is an abundant number, since it is smaller than the sum of its proper divisors (43262370).

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

25684830 is a wasteful number, since it uses less digits than its factorization.

25684830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 646 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 25684830 is about 5068.0203235583. The cubic root of 25684830 is about 295.0476988848.

The spelling of 25684830 in words is "twenty-five million, six hundred eighty-four thousand, eight hundred thirty".