25385728 has 36 divisors (see below), whose sum is σ = 51655968. Its totient is φ = 12446720.

The previous prime is 25385719. The next prime is 25385747. The reversal of 25385728 is 82758352.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12633 + ... + 14503.

It is an arithmetic number, because the mean of its divisors is an integer number (1434888).

Almost surely, 2^25385728 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 25385728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25827984).

25385728 is an abundant number, since it is smaller than the sum of its proper divisors (26270240).

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

25385728 is an equidigital number, since it uses as much as digits as its factorization.

25385728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1940 (or 1926 counting only the distinct ones).

The product of its digits is 134400, while the sum is 40.

The square root of 25385728 is about 5038.4251507788. The cubic root of 25385728 is about 293.8979391835.

The spelling of 25385728 in words is "twenty-five million, three hundred eighty-five thousand, seven hundred twenty-eight".