25389216 has 72 divisors (see below), whose sum is σ = 72727200. Its totient is φ = 8401536.

The previous prime is 25389167. The next prime is 25389227. The reversal of 25389216 is 61298352.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×25389216² = 1289224578189312, which contains 22 as substring.

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

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, 57091 + ... + 57533.

It is an arithmetic number, because the mean of its divisors is an integer number (1010100).

Almost surely, 2^25389216 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 25389216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36363600).

25389216 is an abundant number, since it is smaller than the sum of its proper divisors (47337984).

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

25389216 is a wasteful number, since it uses less digits than its factorization.

25389216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 658 (or 647 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 25389216 is about 5038.7712787941. The cubic root of 25389216 is about 293.9113990964.

The spelling of 25389216 in words is "twenty-five million, three hundred eighty-nine thousand, two hundred sixteen".