25051840 has 84 divisors (see below), whose sum is σ = 65672208. Its totient is φ = 9095680.

The previous prime is 25051783. The next prime is 25051847. The reversal of 25051840 is 4815052.

It is not an unprimeable number, because it can be changed into a prime (25051847) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 38397 + ... + 39043.

It is an arithmetic number, because the mean of its divisors is an integer number (781812).

Almost surely, 2^25051840 is an apocalyptic number.

25051840 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 25051840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32836104).

25051840 is an abundant number, since it is smaller than the sum of its proper divisors (40620368).

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

25051840 is a wasteful number, since it uses less digits than its factorization.

25051840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686 (or 665 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 25051840 is about 5005.1813153971. The cubic root of 25051840 is about 292.6037423909.

Adding to 25051840 its reverse (4815052), we get a palindrome (29866892).

It can be divided in two parts, 250 and 51840, that multiplied together give a 4-th power (12960000 = 60⁴).

The spelling of 25051840 in words is "twenty-five million, fifty-one thousand, eight hundred forty".