489478457 has 8 divisors (see below), whose sum is σ = 535773000. Its totient is φ = 444418560.

The previous prime is 489478411. The next prime is 489478463. The reversal of 489478457 is 754874984.

It can be written as a sum of positive squares in 4 ways, for example, as 29333056 + 460145401 = 5416^2 + 21451^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 489478457 - 2⁸ = 489478201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (489478357) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307832 + ... + 309417.

It is an arithmetic number, because the mean of its divisors is an integer number (66971625).

Almost surely, 2^489478457 is an apocalyptic number.

It is an amenable number.

489478457 is a deficient number, since it is larger than the sum of its proper divisors (46294543).

489478457 is a wasteful number, since it uses less digits than its factorization.

489478457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617323.

The product of its digits is 9031680, while the sum is 56.

The square root of 489478457 is about 22124.1600292531. The cubic root of 489478457 is about 788.0937090623.

The spelling of 489478457 in words is "four hundred eighty-nine million, four hundred seventy-eight thousand, four hundred fifty-seven".