25840512 has 64 divisors (see below), whose sum is σ = 76275600. Its totient is φ = 8612352.

The previous prime is 25840487. The next prime is 25840519. The reversal of 25840512 is 21504852.

It is a happy number.

25840512 is a `hidden beast` number, since 258 + 405 + 1 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25840519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 283 + ... + 7194.

Almost surely, 2^25840512 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 25840512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38137800).

25840512 is an abundant number, since it is smaller than the sum of its proper divisors (50435088).

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

25840512 is an equidigital number, since it uses as much as digits as its factorization.

25840512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7500 (or 7482 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 25840512 is about 5083.3563715325. The cubic root of 25840512 is about 295.6426171325.

The spelling of 25840512 in words is "twenty-five million, eight hundred forty thousand, five hundred twelve".