25390530 has 128 divisors (see below), whose sum is σ = 75479040. Its totient is φ = 6022080.

The previous prime is 25390529. The next prime is 25390531. The reversal of 25390530 is 3509352.

It is an interprime number because it is at equal distance from previous prime (25390529) and next prime (25390531).

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25390494 and 25390503.

It is not an unprimeable number, because it can be changed into a prime (25390531) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 246459 + ... + 246561.

It is an arithmetic number, because the mean of its divisors is an integer number (589680).

Almost surely, 2^25390530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25390530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37739520).

25390530 is an abundant number, since it is smaller than the sum of its proper divisors (50088510).

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

25390530 is a wasteful number, since it uses less digits than its factorization.

25390530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213 (or 207 counting only the distinct ones).

The product of its (nonzero) digits is 4050, while the sum is 27.

The square root of 25390530 is about 5038.9016660379. The cubic root of 25390530 is about 293.9164693976.

Adding to 25390530 its reverse (3509352), we get a palindrome (28899882).

The spelling of 25390530 in words is "twenty-five million, three hundred ninety thousand, five hundred thirty".