25693530 has 48 divisors (see below), whose sum is σ = 64501920. Its totient is φ = 6549664.

The previous prime is 25693523. The next prime is 25693531. The reversal of 25693530 is 3539652.

It is a junction number, because it is equal to n+sod(n) for n = 25693491 and 25693500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25693531) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15061 + ... + 16679.

It is an arithmetic number, because the mean of its divisors is an integer number (1343790).

Almost surely, 2^25693530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25693530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32250960).

25693530 is an abundant number, since it is smaller than the sum of its proper divisors (38808390).

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

25693530 is a wasteful number, since it uses less digits than its factorization.

25693530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1675 (or 1652 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 33.

The square root of 25693530 is about 5068.8785742016. The cubic root of 25693530 is about 295.0810081081.

The spelling of 25693530 in words is "twenty-five million, six hundred ninety-three thousand, five hundred thirty".