25138900 has 72 divisors (see below), whose sum is σ = 58433760. Its totient is φ = 9360000.

The previous prime is 25138871. The next prime is 25138943. The reversal of 25138900 is 983152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191835 + ... + 191965.

It is an arithmetic number, because the mean of its divisors is an integer number (811580).

Almost surely, 2^25138900 is an apocalyptic number.

25138900 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 25138900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29216880).

25138900 is an abundant number, since it is smaller than the sum of its proper divisors (33294860).

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

25138900 is a wasteful number, since it uses less digits than its factorization.

25138900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 265 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 25138900 is about 5013.8707602011. The cubic root of 25138900 is about 292.9423020806.

The spelling of 25138900 in words is "twenty-five million, one hundred thirty-eight thousand, nine hundred".