25789920 has 96 divisors (see below), whose sum is σ = 87508512. Its totient is φ = 6346752.

The previous prime is 25789909. The next prime is 25789927. The reversal of 25789920 is 2998752.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25789927) 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, 4174 + ... + 8306.

It is an arithmetic number, because the mean of its divisors is an integer number (911547).

Almost surely, 2^25789920 is an apocalyptic number.

25789920 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 25789920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43754256).

25789920 is an abundant number, since it is smaller than the sum of its proper divisors (61718592).

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

25789920 is a wasteful number, since it uses less digits than its factorization.

25789920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4164 (or 4156 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 25789920 is about 5078.3776937128. The cubic root of 25789920 is about 295.4495491929.

The spelling of 25789920 in words is "twenty-five million, seven hundred eighty-nine thousand, nine hundred twenty".