25782240 has 192 divisors, whose sum is σ = 93623040. Its totient is φ = 5898240.

The previous prime is 25782227. The next prime is 25782257. The reversal of 25782240 is 4228752.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 25782198 and 25782207.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 100192 + ... + 100448.

It is an arithmetic number, because the mean of its divisors is an integer number (487620).

Almost surely, 2^25782240 is an apocalyptic number.

25782240 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 25782240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46811520).

25782240 is an abundant number, since it is smaller than the sum of its proper divisors (67840800).

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

25782240 is a wasteful number, since it uses less digits than its factorization.

25782240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305 (or 297 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 30.

The square root of 25782240 is about 5077.6214904225. The cubic root of 25782240 is about 295.4202188989.

The spelling of 25782240 in words is "twenty-five million, seven hundred eighty-two thousand, two hundred forty".