25858020 has 96 divisors (see below), whose sum is σ = 77728896. Its totient is φ = 6400000.

The previous prime is 25858013. The next prime is 25858039. The reversal of 25858020 is 2085852.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 102895 + ... + 103145.

It is an arithmetic number, because the mean of its divisors is an integer number (809676).

Almost surely, 2^25858020 is an apocalyptic number.

25858020 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 25858020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38864448).

25858020 is an abundant number, since it is smaller than the sum of its proper divisors (51870876).

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

25858020 is a wasteful number, since it uses less digits than its factorization.

25858020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 379 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 30.

The square root of 25858020 is about 5085.0781704906. The cubic root of 25858020 is about 295.7093720324.

The spelling of 25858020 in words is "twenty-five million, eight hundred fifty-eight thousand, twenty".