25804040 has 32 divisors (see below), whose sum is σ = 58861080. Its totient is φ = 10179072.

The previous prime is 25804039. The next prime is 25804067. The reversal of 25804040 is 4040852.

25804040 is nontrivially palindromic in base 9.

It can be written as a sum of positive squares in 4 ways, for example, as 25745476 + 58564 = 5074^2 + 242^2 .

It is a super-3 number, since 3×25804040³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25803997 and 25804015.

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, 1499 + ... + 7338.

Almost surely, 2^25804040 is an apocalyptic number.

25804040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25804040 is an abundant number, since it is smaller than the sum of its proper divisors (33057040).

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

25804040 is a wasteful number, since it uses less digits than its factorization.

25804040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8921 (or 8917 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 25804040 is about 5079.7677112246. The cubic root of 25804040 is about 295.5034589701.

Adding to 25804040 its reverse (4040852), we get a palindrome (29844892).

The spelling of 25804040 in words is "twenty-five million, eight hundred four thousand, forty".