25128450 has 72 divisors (see below), whose sum is σ = 71089200. Its totient is φ = 6346080.

The previous prime is 25128437. The next prime is 25128451. The reversal of 25128450 is 5482152.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25128451) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 7081 + ... + 10019.

It is an arithmetic number, because the mean of its divisors is an integer number (987350).

Almost surely, 2^25128450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25128450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35544600).

25128450 is an abundant number, since it is smaller than the sum of its proper divisors (45960750).

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

25128450 is a wasteful number, since it uses less digits than its factorization.

25128450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2976 (or 2968 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 27.

The square root of 25128450 is about 5012.8285428488. The cubic root of 25128450 is about 292.9017053516.

The spelling of 25128450 in words is "twenty-five million, one hundred twenty-eight thousand, four hundred fifty".