25723840 has 28 divisors (see below), whose sum is σ = 61255656. Its totient is φ = 10289408.

The previous prime is 25723811. The next prime is 25723849. The reversal of 25723840 is 4832752.

It is a super-3 number, since 3×25723840³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25723849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39874 + ... + 40513.

It is an arithmetic number, because the mean of its divisors is an integer number (2187702).

Almost surely, 2^25723840 is an apocalyptic number.

25723840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25723840 is an abundant number, since it is smaller than the sum of its proper divisors (35531816).

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

25723840 is an equidigital number, since it uses as much as digits as its factorization.

25723840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80404 (or 80394 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 25723840 is about 5071.8675061559. The cubic root of 25723840 is about 295.1969956828.

The spelling of 25723840 in words is "twenty-five million, seven hundred twenty-three thousand, eight hundred forty".