25600320 has 112 divisors (see below), whose sum is σ = 90342720. Its totient is φ = 6824448.

The previous prime is 25600319. The next prime is 25600321. The reversal of 25600320 is 2300652.

It is an interprime number because it is at equal distance from previous prime (25600319) and next prime (25600321).

It is a super-3 number, since 3×25600320³ (a number of 23 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 25600293 and 25600302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25600321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7159 + ... + 10121.

Almost surely, 2^25600320 is an apocalyptic number.

25600320 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 25600320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45171360).

25600320 is an abundant number, since it is smaller than the sum of its proper divisors (64742400).

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

25600320 is a wasteful number, since it uses less digits than its factorization.

25600320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989 (or 2973 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 25600320 is about 5059.6758789472. The cubic root of 25600320 is about 294.7237478966.

Adding to 25600320 its reverse (2300652), we get a palindrome (27900972).

The spelling of 25600320 in words is "twenty-five million, six hundred thousand, three hundred twenty".