25394540 has 24 divisors (see below), whose sum is σ = 53449872. Its totient is φ = 10134720.

The previous prime is 25394533. The next prime is 25394557. The reversal of 25394540 is 4549352.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25394497 and 25394506.

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, 9647 + ... + 11993.

It is an arithmetic number, because the mean of its divisors is an integer number (2227078).

Almost surely, 2^25394540 is an apocalyptic number.

25394540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25394540 is an abundant number, since it is smaller than the sum of its proper divisors (28055332).

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

25394540 is a wasteful number, since it uses less digits than its factorization.

25394540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2897 (or 2895 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 32.

The square root of 25394540 is about 5039.2995545016. The cubic root of 25394540 is about 293.9319416097.

The spelling of 25394540 in words is "twenty-five million, three hundred ninety-four thousand, five hundred forty".