25449984 has 160 divisors (see below), whose sum is σ = 86423040. Its totient is φ = 7243776.

The previous prime is 25449959. The next prime is 25449989. The reversal of 25449984 is 48994452.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25449989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96637 + ... + 96899.

It is an arithmetic number, because the mean of its divisors is an integer number (540144).

Almost surely, 2^25449984 is an apocalyptic number.

25449984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25449984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43211520).

25449984 is an abundant number, since it is smaller than the sum of its proper divisors (60973056).

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

25449984 is an equidigital number, since it uses as much as digits as its factorization.

25449984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 275 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 25449984 is about 5044.7977164600. The cubic root of 25449984 is about 294.1457003767.

The spelling of 25449984 in words is "twenty-five million, four hundred forty-nine thousand, nine hundred eighty-four".