25489398 has 32 divisors (see below), whose sum is σ = 56039040. Its totient is φ = 7664960.

The previous prime is 25489397. The next prime is 25489423. The reversal of 25489398 is 89398452.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25489391) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7633 + ... + 10451.

It is an arithmetic number, because the mean of its divisors is an integer number (1751220).

Almost surely, 2^25489398 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25489398, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28019520).

25489398 is an abundant number, since it is smaller than the sum of its proper divisors (30549642).

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

25489398 is a wasteful number, since it uses less digits than its factorization.

25489398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2972.

The product of its digits is 622080, while the sum is 48.

The square root of 25489398 is about 5048.7026056206. The cubic root of 25489398 is about 294.2974683688.

The spelling of 25489398 in words is "twenty-five million, four hundred eighty-nine thousand, three hundred ninety-eight".