25845408 has 72 divisors (see below), whose sum is σ = 75243168. Its totient is φ = 8410752.

The previous prime is 25845401. The next prime is 25845419. The reversal of 25845408 is 80454852.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×25845408² = 1335970229372928, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (25845401) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 11341 + ... + 13427.

It is an arithmetic number, because the mean of its divisors is an integer number (1045044).

Almost surely, 2^25845408 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 25845408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37621584).

25845408 is an abundant number, since it is smaller than the sum of its proper divisors (49397760).

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

25845408 is a wasteful number, since it uses less digits than its factorization.

25845408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146 (or 2135 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 36.

The square root of 25845408 is about 5083.8379203118. The cubic root of 25845408 is about 295.6612877487.

The spelling of 25845408 in words is "twenty-five million, eight hundred forty-five thousand, four hundred eight".