25728157 has 16 divisors (see below), whose sum is σ = 33530112. Its totient is φ = 19157760.

The previous prime is 25728139. The next prime is 25728163. The reversal of 25728157 is 75182752.

It is a cyclic number.

It is not a de Polignac number, because 25728157 - 2⁷ = 25728029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25728107) 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 15 ways as a sum of consecutive naturals, for example, 6769 + ... + 9862.

It is an arithmetic number, because the mean of its divisors is an integer number (2095632).

Almost surely, 2^25728157 is an apocalyptic number.

It is an amenable number.

25728157 is a deficient number, since it is larger than the sum of its proper divisors (7801955).

25728157 is a wasteful number, since it uses less digits than its factorization.

25728157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16668.

The product of its digits is 39200, while the sum is 37.

The square root of 25728157 is about 5072.2930711859. The cubic root of 25728157 is about 295.2135081754.

The spelling of 25728157 in words is "twenty-five million, seven hundred twenty-eight thousand, one hundred fifty-seven".