25493660 has 48 divisors (see below), whose sum is σ = 56379456. Its totient is φ = 9664512.

The previous prime is 25493651. The next prime is 25493707. The reversal of 25493660 is 6639452.

It is a plaindrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 25493660.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72044 + ... + 72396.

It is an arithmetic number, because the mean of its divisors is an integer number (1174572).

Almost surely, 2^25493660 is an apocalyptic number.

25493660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25493660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28189728).

25493660 is an abundant number, since it is smaller than the sum of its proper divisors (30885796).

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

25493660 is a wasteful number, since it uses less digits than its factorization.

25493660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 25493660 is about 5049.1246766147. The cubic root of 25493660 is about 294.3138702980.

The spelling of 25493660 in words is "twenty-five million, four hundred ninety-three thousand, six hundred sixty".