25340540 has 24 divisors (see below), whose sum is σ = 56346192. Its totient is φ = 9539840.

The previous prime is 25340507. The next prime is 25340551. The reversal of 25340540 is 4504352.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36926 + ... + 37605.

It is an arithmetic number, because the mean of its divisors is an integer number (2347758).

Almost surely, 2^25340540 is an apocalyptic number.

25340540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25340540 is an abundant number, since it is smaller than the sum of its proper divisors (31005652).

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

25340540 is a wasteful number, since it uses less digits than its factorization.

25340540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74557 (or 74555 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 23.

The square root of 25340540 is about 5033.9388156790. The cubic root of 25340540 is about 293.7234507468.

Adding to 25340540 its reverse (4504352), we get a palindrome (29844892).

The spelling of 25340540 in words is "twenty-five million, three hundred forty thousand, five hundred forty".