25128216 has 48 divisors (see below), whose sum is σ = 69084600. Its totient is φ = 8249472.

The previous prime is 25128161. The next prime is 25128223. The reversal of 25128216 is 61282152.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 25128216.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2220 + ... + 7428.

Almost surely, 2^25128216 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 25128216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34542300).

25128216 is an abundant number, since it is smaller than the sum of its proper divisors (43956384).

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

25128216 is a wasteful number, since it uses less digits than its factorization.

25128216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5288 (or 5281 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 25128216 is about 5012.8052026784. The cubic root of 25128216 is about 292.9007961669.

The spelling of 25128216 in words is "twenty-five million, one hundred twenty-eight thousand, two hundred sixteen".