25858164 has 48 divisors (see below), whose sum is σ = 66286080. Its totient is φ = 7809120.

The previous prime is 25858159. The next prime is 25858171. The reversal of 25858164 is 46185852.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2779 + ... + 7709.

It is an arithmetic number, because the mean of its divisors is an integer number (1380960).

Almost surely, 2^25858164 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25858164, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33143040).

25858164 is an abundant number, since it is smaller than the sum of its proper divisors (40427916).

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

25858164 is a wasteful number, since it uses less digits than its factorization.

25858164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4980 (or 4978 counting only the distinct ones).

The product of its digits is 76800, while the sum is 39.

The square root of 25858164 is about 5085.0923295453. The cubic root of 25858164 is about 295.7099209539.

The spelling of 25858164 in words is "twenty-five million, eight hundred fifty-eight thousand, one hundred sixty-four".