25138908 has 72 divisors (see below), whose sum is σ = 67206048. Its totient is φ = 7907328.

The previous prime is 25138871. The next prime is 25138943. The reversal of 25138908 is 80983152.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 80160 + ... + 80472.

Almost surely, 2^25138908 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25138908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33603024).

25138908 is an abundant number, since it is smaller than the sum of its proper divisors (42067140).

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

25138908 is a wasteful number, since it uses less digits than its factorization.

25138908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 443 (or 438 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 25138908 is about 5013.8715579879. The cubic root of 25138908 is about 292.9423331551.

The spelling of 25138908 in words is "twenty-five million, one hundred thirty-eight thousand, nine hundred eight".