25628387 has 4 divisors (see below), whose sum is σ = 26224440. Its totient is φ = 25032336.

The previous prime is 25628377. The next prime is 25628389. The reversal of 25628387 is 78382652.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 25628387 - 2²⁰ = 24579811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25628389) 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 3 ways as a sum of consecutive naturals, for example, 297962 + ... + 298047.

It is an arithmetic number, because the mean of its divisors is an integer number (6556110).

Almost surely, 2^25628387 is an apocalyptic number.

25628387 is a deficient number, since it is larger than the sum of its proper divisors (596053).

25628387 is an equidigital number, since it uses as much as digits as its factorization.

25628387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596052.

The product of its digits is 161280, while the sum is 41.

The square root of 25628387 is about 5062.4487157896. The cubic root of 25628387 is about 294.8314156947.

The spelling of 25628387 in words is "twenty-five million, six hundred twenty-eight thousand, three hundred eighty-seven".