25028389 has 4 divisors (see below), whose sum is σ = 25117740. Its totient is φ = 24939040.

The previous prime is 25028383. The next prime is 25028407. The reversal of 25028389 is 98382052.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10144225 + 14884164 = 3185^2 + 3858^2 .

It is a cyclic number.

It is not a de Polignac number, because 25028389 - 2⁵ = 25028357 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 (25028383) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44254 + ... + 44815.

It is an arithmetic number, because the mean of its divisors is an integer number (6279435).

Almost surely, 2^25028389 is an apocalyptic number.

It is an amenable number.

25028389 is a deficient number, since it is larger than the sum of its proper divisors (89351).

25028389 is an equidigital number, since it uses as much as digits as its factorization.

25028389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89350.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 25028389 is about 5002.8380945219. The cubic root of 25028389 is about 292.5124118726.

The spelling of 25028389 in words is "twenty-five million, twenty-eight thousand, three hundred eighty-nine".