25782720 has 112 divisors (see below), whose sum is σ = 82954368. Its totient is φ = 6784000.

The previous prime is 25782719. The next prime is 25782721. The reversal of 25782720 is 2728752.

It is an interprime number because it is at equal distance from previous prime (25782719) and next prime (25782721).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25782721) 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, 102595 + ... + 102845.

It is an arithmetic number, because the mean of its divisors is an integer number (740664).

Almost surely, 2^25782720 is an apocalyptic number.

25782720 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 25782720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41477184).

25782720 is an abundant number, since it is smaller than the sum of its proper divisors (57171648).

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

25782720 is a wasteful number, since it uses less digits than its factorization.

25782720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378 (or 368 counting only the distinct ones).

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 25782720 is about 5077.6687564275. The cubic root of 25782720 is about 295.4220522129.

The spelling of 25782720 in words is "twenty-five million, seven hundred eighty-two thousand, seven hundred twenty".