25231648 has 48 divisors (see below), whose sum is σ = 54020736. Its totient is φ = 11531520.

The previous prime is 25231643. The next prime is 25231649. The reversal of 25231648 is 84613252.

It is not an unprimeable number, because it can be changed into a prime (25231643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54265 + ... + 54727.

It is an arithmetic number, because the mean of its divisors is an integer number (1125432).

Almost surely, 2^25231648 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 25231648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27010368).

25231648 is an abundant number, since it is smaller than the sum of its proper divisors (28789088).

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

25231648 is a wasteful number, since it uses less digits than its factorization.

25231648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 617 (or 609 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

The square root of 25231648 is about 5023.1113863820. Note that the first 3 decimals coincide. The cubic root of 25231648 is about 293.3021224828.

The spelling of 25231648 in words is "twenty-five million, two hundred thirty-one thousand, six hundred forty-eight".