25235728 has 40 divisors (see below), whose sum is σ = 56315840. Its totient is φ = 10730880.

The previous prime is 25235723. The next prime is 25235737. The reversal of 25235728 is 82753252.

It is a junction number, because it is equal to n+sod(n) for n = 25235693 and 25235702.

It is not an unprimeable number, because it can be changed into a prime (25235723) 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, 14758 + ... + 16378.

It is an arithmetic number, because the mean of its divisors is an integer number (1407896).

Almost surely, 2^25235728 is an apocalyptic number.

25235728 is a gapful number since it is divisible by the number (28) 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 25235728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28157920).

25235728 is an abundant number, since it is smaller than the sum of its proper divisors (31080112).

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

25235728 is a wasteful number, since it uses less digits than its factorization.

25235728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1775 (or 1769 counting only the distinct ones).

The product of its digits is 33600, while the sum is 34.

The square root of 25235728 is about 5023.5174927535. The cubic root of 25235728 is about 293.3179307799.

The spelling of 25235728 in words is "twenty-five million, two hundred thirty-five thousand, seven hundred twenty-eight".