25489620 has 96 divisors (see below), whose sum is σ = 85424640. Its totient is φ = 6272640.

The previous prime is 25489609. The next prime is 25489627. The reversal of 25489620 is 2698452.

It is a happy number.

25489620 is a `hidden beast` number, since 2 + 548 + 96 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25489627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5205 + ... + 8835.

It is an arithmetic number, because the mean of its divisors is an integer number (889840).

Almost surely, 2^25489620 is an apocalyptic number.

25489620 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 25489620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42712320).

25489620 is an abundant number, since it is smaller than the sum of its proper divisors (59935020).

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

25489620 is a wasteful number, since it uses less digits than its factorization.

25489620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3662 (or 3654 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 25489620 is about 5048.7245914191. The cubic root of 25489620 is about 294.2983227612.

The spelling of 25489620 in words is "twenty-five million, four hundred eighty-nine thousand, six hundred twenty".