25858920 has 64 divisors (see below), whose sum is σ = 78304320. Its totient is φ = 6831104.

The previous prime is 25858919. The next prime is 25858957. The reversal of 25858920 is 2985852.

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 15 ways as a sum of consecutive naturals, for example, 12607 + ... + 14513.

It is an arithmetic number, because the mean of its divisors is an integer number (1223505).

Almost surely, 2^25858920 is an apocalyptic number.

25858920 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 25858920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39152160).

25858920 is an abundant number, since it is smaller than the sum of its proper divisors (52445400).

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

25858920 is a wasteful number, since it uses less digits than its factorization.

25858920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2034 (or 2030 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 25858920 is about 5085.1666639354. The cubic root of 25858920 is about 295.7128027584.

The spelling of 25858920 in words is "twenty-five million, eight hundred fifty-eight thousand, nine hundred twenty".