25552320 has 112 divisors (see below), whose sum is σ = 83149440. Its totient is φ = 6644736.

The previous prime is 25552301. The next prime is 25552337. The reversal of 25552320 is 2325552.

It is a Harshad number since it is a multiple of its sum of digits (24).

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 15 ways as a sum of consecutive naturals, for example, 40971 + ... + 41589.

Almost surely, 2^25552320 is an apocalyptic number.

25552320 is a gapful number since it is divisible by the number (20) 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 25552320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41574720).

25552320 is an abundant number, since it is smaller than the sum of its proper divisors (57597120).

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

25552320 is a wasteful number, since it uses less digits than its factorization.

25552320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 682 (or 672 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 24.

The square root of 25552320 is about 5054.9302665813. The cubic root of 25552320 is about 294.5394326130.

Adding to 25552320 its reverse (2325552), we get a palindrome (27877872).

The spelling of 25552320 in words is "twenty-five million, five hundred fifty-two thousand, three hundred twenty".