25012440 has 192 divisors, whose sum is σ = 88788960. Its totient is φ = 6082560.

The previous prime is 25012433. The next prime is 25012441. The reversal of 25012440 is 4421052.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25012441) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 373287 + ... + 373353.

Almost surely, 2^25012440 is an apocalyptic number.

25012440 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 25012440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44394480).

25012440 is an abundant number, since it is smaller than the sum of its proper divisors (63776520).

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

25012440 is a wasteful number, since it uses less digits than its factorization.

25012440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 155 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 25012440 is about 5001.2438452849. The cubic root of 25012440 is about 292.4502654866.

Adding to 25012440 its reverse (4421052), we get a palindrome (29433492).

It can be divided in two parts, 25012 and 440, that added together give a palindrome (25452).

The spelling of 25012440 in words is "twenty-five million, twelve thousand, four hundred forty".