25480140 has 192 divisors, whose sum is σ = 89456640. Its totient is φ = 5287680.

The previous prime is 25480129. The next prime is 25480151. The reversal of 25480140 is 4108452.

It is an interprime number because it is at equal distance from previous prime (25480129) and next prime (25480151).

It is a self number, because there is not a number n which added to its sum of digits gives 25480140.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 247329 + ... + 247431.

It is an arithmetic number, because the mean of its divisors is an integer number (465920).

Almost surely, 2^25480140 is an apocalyptic number.

25480140 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 25480140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44728320).

25480140 is an abundant number, since it is smaller than the sum of its proper divisors (63976500).

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

25480140 is a wasteful number, since it uses less digits than its factorization.

25480140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172 (or 170 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 25480140 is about 5047.7856531354. The cubic root of 25480140 is about 294.2618334759.

Adding to 25480140 its reverse (4108452), we get a palindrome (29588592).

The spelling of 25480140 in words is "twenty-five million, four hundred eighty thousand, one hundred forty".