25643464 has 96 divisors (see below), whose sum is σ = 64432800. Its totient is φ = 9434880.

The previous prime is 25643441. The next prime is 25643489. The reversal of 25643464 is 46434652.

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 23 ways as a sum of consecutive naturals, for example, 81772 + ... + 82084.

It is an arithmetic number, because the mean of its divisors is an integer number (671175).

Almost surely, 2^25643464 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 25643464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32216400).

25643464 is an abundant number, since it is smaller than the sum of its proper divisors (38789336).

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

25643464 is a wasteful number, since it uses less digits than its factorization.

25643464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 363 (or 352 counting only the distinct ones).

The product of its digits is 69120, while the sum is 34.

The square root of 25643464 is about 5063.9375983517. The cubic root of 25643464 is about 294.8892201110.

The spelling of 25643464 in words is "twenty-five million, six hundred forty-three thousand, four hundred sixty-four".