25876640 has 24 divisors (see below), whose sum is σ = 61133940. Its totient is φ = 10350592.

The previous prime is 25876639. The next prime is 25876663. The reversal of 25876640 is 4667852.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 25847056 + 29584 = 5084^2 + 172^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25876594 and 25876603.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80705 + ... + 81024.

Almost surely, 2^25876640 is an apocalyptic number.

25876640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25876640 is an abundant number, since it is smaller than the sum of its proper divisors (35257300).

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

25876640 is a wasteful number, since it uses less digits than its factorization.

25876640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161744 (or 161736 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 25876640 is about 5086.9086879951. The cubic root of 25876640 is about 295.7803337355.

The spelling of 25876640 in words is "twenty-five million, eight hundred seventy-six thousand, six hundred forty".