25404216 has 32 divisors (see below), whose sum is σ = 66854400. Its totient is φ = 8022240.

The previous prime is 25404209. The next prime is 25404233. The reversal of 25404216 is 61240452.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27400 + ... + 28311.

It is an arithmetic number, because the mean of its divisors is an integer number (2089200).

Almost surely, 2^25404216 is an apocalyptic number.

It is an amenable number.

25404216 is an abundant number, since it is smaller than the sum of its proper divisors (41450184).

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

25404216 is a wasteful number, since it uses less digits than its factorization.

25404216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55739 (or 55735 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 25404216 is about 5040.2595171281. The cubic root of 25404216 is about 293.9692688504.

Adding to 25404216 its reverse (61240452), we get a palindrome (86644668).

The spelling of 25404216 in words is "twenty-five million, four hundred four thousand, two hundred sixteen".