25532240 has 40 divisors (see below), whose sum is σ = 59579520. Its totient is φ = 10175616.

The previous prime is 25532161. The next prime is 25532281. The reversal of 25532240 is 4223552.

It is a tau number, because it is divible by the number of its divisors (40).

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, 34757 + ... + 35483.

It is an arithmetic number, because the mean of its divisors is an integer number (1489488).

Almost surely, 2^25532240 is an apocalyptic number.

25532240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25532240 is an abundant number, since it is smaller than the sum of its proper divisors (34047280).

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

25532240 is a wasteful number, since it uses less digits than its factorization.

25532240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1179 (or 1173 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 25532240 is about 5052.9436965001. The cubic root of 25532240 is about 294.4622589066.

Adding to 25532240 its reverse (4223552), we get a palindrome (29755792).

The spelling of 25532240 in words is "twenty-five million, five hundred thirty-two thousand, two hundred forty".