25041440 has 48 divisors (see below), whose sum is σ = 60297048. Its totient is φ = 9824256.

The previous prime is 25041439. The next prime is 25041481. The reversal of 25041440 is 4414052.

It can be written as a sum of positive squares in 4 ways, for example, as 24245776 + 795664 = 4924^2 + 892^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7004 + ... + 9956.

Almost surely, 2^25041440 is an apocalyptic number.

25041440 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 25041440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30148524).

25041440 is an abundant number, since it is smaller than the sum of its proper divisors (35255608).

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

25041440 is a wasteful number, since it uses less digits than its factorization.

25041440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3021 (or 3013 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 25041440 is about 5004.1422841482. The cubic root of 25041440 is about 292.5632463619.

Adding to 25041440 its reverse (4414052), we get a palindrome (29455492).

The spelling of 25041440 in words is "twenty-five million, forty-one thousand, four hundred forty".