25216398 has 24 divisors (see below), whose sum is σ = 54989688. Its totient is φ = 8350992.

The previous prime is 25216397. The next prime is 25216403. The reversal of 25216398 is 89361252.

25216398 is a `hidden beast` number, since 252 + 16 + 398 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25216391) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1636 + ... + 7287.

It is an arithmetic number, because the mean of its divisors is an integer number (2291237).

Almost surely, 2^25216398 is an apocalyptic number.

25216398 is an abundant number, since it is smaller than the sum of its proper divisors (29773290).

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

25216398 is a wasteful number, since it uses less digits than its factorization.

25216398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9088 (or 9085 counting only the distinct ones).

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

The square root of 25216398 is about 5021.5931734859. The cubic root of 25216398 is about 293.2430200042.

The spelling of 25216398 in words is "twenty-five million, two hundred sixteen thousand, three hundred ninety-eight".