25861920 has 192 divisors, whose sum is σ = 95800320. Its totient is φ = 5741568.

The previous prime is 25861909. The next prime is 25861931. The reversal of 25861920 is 2916852.

It is an interprime number because it is at equal distance from previous prime (25861909) and next prime (25861931).

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 31 ways as a sum of consecutive naturals, for example, 144391 + ... + 144569.

It is an arithmetic number, because the mean of its divisors is an integer number (498960).

Almost surely, 2^25861920 is an apocalyptic number.

25861920 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 25861920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47900160).

25861920 is an abundant number, since it is smaller than the sum of its proper divisors (69938400).

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

25861920 is a wasteful number, since it uses less digits than its factorization.

25861920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247 (or 239 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 25861920 is about 5085.4616309633. The cubic root of 25861920 is about 295.7242379370.

The spelling of 25861920 in words is "twenty-five million, eight hundred sixty-one thousand, nine hundred twenty".