25490880 has 168 divisors, whose sum is σ = 89867232. Its totient is φ = 6629376.

The previous prime is 25490867. The next prime is 25490893. The reversal of 25490880 is 8809452.

It is an interprime number because it is at equal distance from previous prime (25490867) and next prime (25490893).

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

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 152557 + ... + 152723.

It is an arithmetic number, because the mean of its divisors is an integer number (534924).

Almost surely, 2^25490880 is an apocalyptic number.

25490880 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 25490880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44933616).

25490880 is an abundant number, since it is smaller than the sum of its proper divisors (64376352).

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

25490880 is a wasteful number, since it uses less digits than its factorization.

25490880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243 (or 230 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 25490880 is about 5048.8493738673. The cubic root of 25490880 is about 294.3031719217.

The spelling of 25490880 in words is "twenty-five million, four hundred ninety thousand, eight hundred eighty".