25465840 has 20 divisors (see below), whose sum is σ = 59208264. Its totient is φ = 10186304.

The previous prime is 25465751. The next prime is 25465841. The reversal of 25465840 is 4856452.

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 25465796 and 25465805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25465841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159082 + ... + 159241.

Almost surely, 2^25465840 is an apocalyptic number.

25465840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25465840 is an abundant number, since it is smaller than the sum of its proper divisors (33742424).

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

25465840 is a wasteful number, since it uses less digits than its factorization.

25465840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318336 (or 318330 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 25465840 is about 5046.3689916612. The cubic root of 25465840 is about 294.2067744946.

The spelling of 25465840 in words is "twenty-five million, four hundred sixty-five thousand, eight hundred forty".