204489457 has 8 divisors (see below), whose sum is σ = 218901600. Its totient is φ = 190442304.

The previous prime is 204489407. The next prime is 204489497. The reversal of 204489457 is 754984402.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-204489457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (204489407) 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 7 ways as a sum of consecutive naturals, for example, 90088 + ... + 92329.

It is an arithmetic number, because the mean of its divisors is an integer number (27362700).

Almost surely, 2^204489457 is an apocalyptic number.

It is an amenable number.

204489457 is a deficient number, since it is larger than the sum of its proper divisors (14412143).

204489457 is a wasteful number, since it uses less digits than its factorization.

204489457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182495.

The product of its (nonzero) digits is 322560, while the sum is 43.

The square root of 204489457 is about 14299.9810139734. The cubic root of 204489457 is about 589.1469593316.

The spelling of 204489457 in words is "two hundred four million, four hundred eighty-nine thousand, four hundred fifty-seven".