25215648 has 96 divisors (see below), whose sum is σ = 70479360. Its totient is φ = 7879680.

The previous prime is 25215647. The next prime is 25215661. The reversal of 25215648 is 84651252.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-3 number, since 3×25215648³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (25215647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109998 + ... + 110226.

It is an arithmetic number, because the mean of its divisors is an integer number (734160).

Almost surely, 2^25215648 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 25215648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35239680).

25215648 is an abundant number, since it is smaller than the sum of its proper divisors (45263712).

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

25215648 is a wasteful number, since it uses less digits than its factorization.

25215648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 302 counting only the distinct ones).

The product of its digits is 19200, while the sum is 33.

The square root of 25215648 is about 5021.5184954354. The cubic root of 25215648 is about 293.2401127103.

The spelling of 25215648 in words is "twenty-five million, two hundred fifteen thousand, six hundred forty-eight".