25041840 has 80 divisors (see below), whose sum is σ = 78256896. Its totient is φ = 6624000.

The previous prime is 25041827. The next prime is 25041851. The reversal of 25041840 is 4814052.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 25041840.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35895 + ... + 36585.

Almost surely, 2^25041840 is an apocalyptic number.

25041840 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 25041840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39128448).

25041840 is an abundant number, since it is smaller than the sum of its proper divisors (53215056).

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

25041840 is a wasteful number, since it uses less digits than its factorization.

25041840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858 (or 852 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 24.

The square root of 25041840 is about 5004.1822508778. The cubic root of 25041840 is about 292.5648041088.

Adding to 25041840 its reverse (4814052), we get a palindrome (29855892).

The spelling of 25041840 in words is "twenty-five million, forty-one thousand, eight hundred forty".