25749408 has 72 divisors (see below), whose sum is σ = 71432928. Its totient is φ = 8120448.

The previous prime is 25749401. The next prime is 25749421. The reversal of 25749408 is 80494752.

It is not an unprimeable number, because it can be changed into a prime (25749401) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 34285 + ... + 35027.

It is an arithmetic number, because the mean of its divisors is an integer number (992124).

Almost surely, 2^25749408 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 25749408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35716464).

25749408 is an abundant number, since it is smaller than the sum of its proper divisors (45683520).

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

25749408 is a wasteful number, since it uses less digits than its factorization.

25749408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 25749408 is about 5074.3874507176. The cubic root of 25749408 is about 295.2947661756.

The spelling of 25749408 in words is "twenty-five million, seven hundred forty-nine thousand, four hundred eight".