25023640 has 16 divisors (see below), whose sum is σ = 56303280. Its totient is φ = 10009440.

The previous prime is 25023637. The next prime is 25023673. The reversal of 25023640 is 4632052.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312756 + ... + 312835.

It is an arithmetic number, because the mean of its divisors is an integer number (3518955).

Almost surely, 2^25023640 is an apocalyptic number.

25023640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25023640 is an abundant number, since it is smaller than the sum of its proper divisors (31279640).

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

25023640 is a wasteful number, since it uses less digits than its factorization.

25023640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625602 (or 625598 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 25023640 is about 5002.3634414145. The cubic root of 25023640 is about 292.4939098252.

Adding to 25023640 its reverse (4632052), we get a palindrome (29655692).

The spelling of 25023640 in words is "twenty-five million, twenty-three thousand, six hundred forty".