25449998 has 16 divisors (see below), whose sum is σ = 43728000. Its totient is φ = 10882296.

The previous prime is 25449997. The next prime is 25450001. The reversal of 25449998 is 89994452.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25449997) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5165 + ... + 8807.

It is an arithmetic number, because the mean of its divisors is an integer number (2733000).

Almost surely, 2^25449998 is an apocalyptic number.

25449998 is a deficient number, since it is larger than the sum of its proper divisors (18278002).

25449998 is a wasteful number, since it uses less digits than its factorization.

25449998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4151.

The product of its digits is 933120, while the sum is 50.

The square root of 25449998 is about 5044.7991040278. The cubic root of 25449998 is about 294.1457543131.

The spelling of 25449998 in words is "twenty-five million, four hundred forty-nine thousand, nine hundred ninety-eight".