25725438 has 48 divisors (see below), whose sum is σ = 59195136. Its totient is φ = 8368920.

The previous prime is 25725379. The next prime is 25725451. The reversal of 25725438 is 83452752.

25725438 is a `hidden beast` number, since 2 + 572 + 54 + 38 = 666.

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 23 ways as a sum of consecutive naturals, for example, 20283 + ... + 21513.

It is an arithmetic number, because the mean of its divisors is an integer number (1233232).

Almost surely, 2^25725438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25725438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29597568).

25725438 is an abundant number, since it is smaller than the sum of its proper divisors (33469698).

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

25725438 is a wasteful number, since it uses less digits than its factorization.

25725438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1291 (or 1279 counting only the distinct ones).

The product of its digits is 67200, while the sum is 36.

The square root of 25725438 is about 5072.0250393704. The cubic root of 25725438 is about 295.2031082362.

The spelling of 25725438 in words is "twenty-five million, seven hundred twenty-five thousand, four hundred thirty-eight".