25385216 has 72 divisors (see below), whose sum is σ = 56659680. Its totient is φ = 11280384.

The previous prime is 25385209. The next prime is 25385221. The reversal of 25385216 is 61258352.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82535 + ... + 82841.

It is an arithmetic number, because the mean of its divisors is an integer number (786940).

Almost surely, 2^25385216 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 25385216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28329840).

25385216 is an abundant number, since it is smaller than the sum of its proper divisors (31274464).

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

25385216 is a wasteful number, since it uses less digits than its factorization.

25385216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359 (or 345 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 25385216 is about 5038.3743409953. The cubic root of 25385216 is about 293.8959633127.

The spelling of 25385216 in words is "twenty-five million, three hundred eighty-five thousand, two hundred sixteen".