25407216 has 80 divisors (see below), whose sum is σ = 73765120. Its totient is φ = 8372160.

The previous prime is 25407211. The next prime is 25407223. The reversal of 25407216 is 61270452.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 25407216.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25407211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44211 + ... + 44781.

It is an arithmetic number, because the mean of its divisors is an integer number (922064).

Almost surely, 2^25407216 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 25407216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36882560).

25407216 is an abundant number, since it is smaller than the sum of its proper divisors (48357904).

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

25407216 is a wasteful number, since it uses less digits than its factorization.

25407216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 691 (or 679 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 25407216 is about 5040.5571120661. The cubic root of 25407216 is about 293.9808400675.

Adding to 25407216 its reverse (61270452), we get a palindrome (86677668).

The spelling of 25407216 in words is "twenty-five million, four hundred seven thousand, two hundred sixteen".