25390000 has 50 divisors (see below), whose sum is σ = 61495940. Its totient is φ = 10152000.

The previous prime is 25389989. The next prime is 25390003. The reversal of 25390000 is 9352.

25390000 = 88³ + 89³ + ... + 112³.

It is a tau number, because it is divible by the number of its divisors (50).

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 25390000.

It is not an unprimeable number, because it can be changed into a prime (25390003) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 8731 + ... + 11269.

Almost surely, 2^25390000 is an apocalyptic number.

25390000 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 25390000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30747970).

25390000 is an abundant number, since it is smaller than the sum of its proper divisors (36105940).

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

25390000 is an equidigital number, since it uses as much as digits as its factorization.

25390000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2567 (or 2546 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 25390000 is about 5038.8490749376. The cubic root of 25390000 is about 293.9144243200.

Adding to 25390000 its reverse (9352), we get a palindrome (25399352).

The spelling of 25390000 in words is "twenty-five million, three hundred ninety thousand".