25345540 has 48 divisors (see below), whose sum is σ = 60600960. Its totient is φ = 8814080.

The previous prime is 25345513. The next prime is 25345543. The reversal of 25345540 is 4554352.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 25345499 and 25345508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25345543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2556 + ... + 7564.

It is an arithmetic number, because the mean of its divisors is an integer number (1262520).

Almost surely, 2^25345540 is an apocalyptic number.

25345540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25345540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30300480).

25345540 is an abundant number, since it is smaller than the sum of its proper divisors (35255420).

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

25345540 is a wasteful number, since it uses less digits than its factorization.

25345540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5052 (or 5050 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 28.

The square root of 25345540 is about 5034.4354201837. The cubic root of 25345540 is about 293.7427678920.

Adding to 25345540 its reverse (4554352), we get a palindrome (29899892).

The spelling of 25345540 in words is "twenty-five million, three hundred forty-five thousand, five hundred forty".