25403838 has 8 divisors (see below), whose sum is σ = 50807688. Its totient is φ = 8467944.

The previous prime is 25403813. The next prime is 25403843. The reversal of 25403838 is 83830452.

It is a sphenic number, since it is the product of 3 distinct primes.

25403838 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 25403799 and 25403808.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2116981 + ... + 2116992.

It is an arithmetic number, because the mean of its divisors is an integer number (6350961).

Almost surely, 2^25403838 is an apocalyptic number.

25403838 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

25403838 is a wasteful number, since it uses less digits than its factorization.

25403838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4233978.

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 25403838 is about 5040.2220189194. Note that the first 3 decimals coincide. The cubic root of 25403838 is about 293.9678108124.

The spelling of 25403838 in words is "twenty-five million, four hundred three thousand, eight hundred thirty-eight".