25757440 has 36 divisors (see below), whose sum is σ = 61700184. Its totient is φ = 10302464.

The previous prime is 25757437. The next prime is 25757441. The reversal of 25757440 is 4475752.

It is a junction number, because it is equal to n+sod(n) for n = 25757396 and 25757405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25757441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8782 + ... + 11341.

It is an arithmetic number, because the mean of its divisors is an integer number (1713894).

Almost surely, 2^25757440 is an apocalyptic number.

25757440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25757440 is an abundant number, since it is smaller than the sum of its proper divisors (35942744).

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

25757440 is an equidigital number, since it uses as much as digits as its factorization.

25757440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20144 (or 20130 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 34.

The square root of 25757440 is about 5075.1788145838. The cubic root of 25757440 is about 295.3254667001.

The spelling of 25757440 in words is "twenty-five million, seven hundred fifty-seven thousand, four hundred forty".