25736540 has 24 divisors (see below), whose sum is σ = 56397600. Its totient is φ = 9846848.

The previous prime is 25736533. The next prime is 25736549. The reversal of 25736540 is 4563752.

It is a junction number, because it is equal to n+sod(n) for n = 25736497 and 25736506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25736549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27515 + ... + 28434.

It is an arithmetic number, because the mean of its divisors is an integer number (2349900).

Almost surely, 2^25736540 is an apocalyptic number.

25736540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25736540 is an abundant number, since it is smaller than the sum of its proper divisors (30661060).

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

25736540 is a wasteful number, since it uses less digits than its factorization.

25736540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55981 (or 55979 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 32.

The square root of 25736540 is about 5073.1193559781. The cubic root of 25736540 is about 295.2455678121.

The spelling of 25736540 in words is "twenty-five million, seven hundred thirty-six thousand, five hundred forty".