245628489 has 4 divisors (see below), whose sum is σ = 327504656. Its totient is φ = 163752324.

The previous prime is 245628421. The next prime is 245628497. The reversal of 245628489 is 984826542.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 245628489 - 2⁸ = 245628233 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (245628419) 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 3 ways as a sum of consecutive naturals, for example, 40938079 + ... + 40938084.

It is an arithmetic number, because the mean of its divisors is an integer number (81876164).

Almost surely, 2^245628489 is an apocalyptic number.

It is an amenable number.

245628489 is a deficient number, since it is larger than the sum of its proper divisors (81876167).

245628489 is an equidigital number, since it uses as much as digits as its factorization.

245628489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81876166.

The product of its digits is 1105920, while the sum is 48.

The square root of 245628489 is about 15672.5393283922. The cubic root of 245628489 is about 626.2670734506.

The spelling of 245628489 in words is "two hundred forty-five million, six hundred twenty-eight thousand, four hundred eighty-nine".