25091328 has 72 divisors (see below), whose sum is σ = 68662048. Its totient is φ = 8128512.

The previous prime is 25091327. The next prime is 25091357. The reversal of 25091328 is 82319052.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 25091295 and 25091304.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25091327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27975 + ... + 28857.

Almost surely, 2^25091328 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 25091328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34331024).

25091328 is an abundant number, since it is smaller than the sum of its proper divisors (43570720).

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

25091328 is an equidigital number, since it uses as much as digits as its factorization.

25091328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 939 (or 925 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 25091328 is about 5009.1244743967. The cubic root of 25091328 is about 292.7574007123.

The spelling of 25091328 in words is "twenty-five million, ninety-one thousand, three hundred twenty-eight".