25028189 has 6 divisors (see below), whose sum is σ = 25919130. Its totient is φ = 24139136.

The previous prime is 25028183. The next prime is 25028203. The reversal of 25028189 is 98182052.

It can be written as a sum of positive squares in 3 ways, for example, as 1428025 + 23600164 = 1195^2 + 4858^2 .

It is a de Polignac number, because none of the positive numbers 2^k-25028189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25028183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26477 + ... + 27405.

It is an arithmetic number, because the mean of its divisors is an integer number (4319855).

Almost surely, 2^25028189 is an apocalyptic number.

25028189 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

25028189 is a deficient number, since it is larger than the sum of its proper divisors (890941).

25028189 is an frugal number, since it uses more digits than its factorization.

25028189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1887 (or 958 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 25028189 is about 5002.8181058280. The cubic root of 25028189 is about 292.5116327222.

The spelling of 25028189 in words is "twenty-five million, twenty-eight thousand, one hundred eighty-nine".