25647328 has 48 divisors (see below), whose sum is σ = 58683744. Its totient is φ = 10805760.

The previous prime is 25647317. The next prime is 25647331. The reversal of 25647328 is 82374652.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 12726 + ... + 14602.

It is an arithmetic number, because the mean of its divisors is an integer number (1222578).

Almost surely, 2^25647328 is an apocalyptic number.

25647328 is a gapful number since it is divisible by the number (28) 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 25647328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29341872).

25647328 is an abundant number, since it is smaller than the sum of its proper divisors (33036416).

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

25647328 is a wasteful number, since it uses less digits than its factorization.

25647328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1955 (or 1947 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 25647328 is about 5064.3191052697. The cubic root of 25647328 is about 294.9040308339.

The spelling of 25647328 in words is "twenty-five million, six hundred forty-seven thousand, three hundred twenty-eight".