25728347 has 2 divisors, whose sum is σ = 25728348. Its totient is φ = 25728346.

The previous prime is 25728331. The next prime is 25728371. The reversal of 25728347 is 74382752.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25728347 - 2⁴ = 25728331 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25728347.

It is not a weakly prime, because it can be changed into another prime (25728247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12864173 + 12864174.

It is an arithmetic number, because the mean of its divisors is an integer number (12864174).

Almost surely, 2^25728347 is an apocalyptic number.

25728347 is a deficient number, since it is larger than the sum of its proper divisors (1).

25728347 is an equidigital number, since it uses as much as digits as its factorization.

25728347 is an evil number, because the sum of its binary digits is even.

The product of its digits is 94080, while the sum is 38.

The square root of 25728347 is about 5072.3118003530. The cubic root of 25728347 is about 295.2142348815.

The spelling of 25728347 in words is "twenty-five million, seven hundred twenty-eight thousand, three hundred forty-seven".