25004340 has 72 divisors (see below), whose sum is σ = 77307048. Its totient is φ = 6539520.

The previous prime is 25004339. The next prime is 25004359. The reversal of 25004340 is 4340052.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 8259876 + 16744464 = 2874^2 + 4092^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8230 + ... + 10850.

It is an arithmetic number, because the mean of its divisors is an integer number (1073709).

Almost surely, 2^25004340 is an apocalyptic number.

25004340 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 25004340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38653524).

25004340 is an abundant number, since it is smaller than the sum of its proper divisors (52302708).

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

25004340 is a wasteful number, since it uses less digits than its factorization.

25004340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2689 (or 2684 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 18.

The square root of 25004340 is about 5000.4339811660. The cubic root of 25004340 is about 292.4186931582.

Adding to 25004340 its reverse (4340052), we get a palindrome (29344392).

The spelling of 25004340 in words is "twenty-five million, four thousand, three hundred forty".