25647648 has 48 divisors (see below), whose sum is σ = 72507456. Its totient is φ = 7891200.

The previous prime is 25647647. The next prime is 25647649. The reversal of 25647648 is 84674652.

It is an interprime number because it is at equal distance from previous prime (25647647) and next prime (25647649).

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (25647641) 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, 9028 + ... + 11523.

It is an arithmetic number, because the mean of its divisors is an integer number (1510572).

Almost surely, 2^25647648 is an apocalyptic number.

It is an amenable number.

25647648 is an abundant number, since it is smaller than the sum of its proper divisors (46859808).

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

25647648 is a wasteful number, since it uses less digits than its factorization.

25647648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20577 (or 20569 counting only the distinct ones).

The product of its digits is 322560, while the sum is 42.

The square root of 25647648 is about 5064.3506987569. The cubic root of 25647648 is about 294.9052573281.

The spelling of 25647648 in words is "twenty-five million, six hundred forty-seven thousand, six hundred forty-eight".