489581478 has 12 divisors (see below), whose sum is σ = 1060759908. Its totient is φ = 163193820.

The previous prime is 489581467. The next prime is 489581483. The reversal of 489581478 is 874185984.

489581478 is a `hidden beast` number, since 4 + 8 + 95 + 81 + 478 = 666.

It is a congruent number.

It is an unprimeable number.

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, 13599468 + ... + 13599503.

It is an arithmetic number, because the mean of its divisors is an integer number (88396659).

Almost surely, 2^489581478 is an apocalyptic number.

489581478 is an abundant number, since it is smaller than the sum of its proper divisors (571178430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

489581478 is a wasteful number, since it uses less digits than its factorization.

489581478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27198979 (or 27198976 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The square root of 489581478 is about 22126.4881533424. The cubic root of 489581478 is about 788.1489954632.

The spelling of 489581478 in words is "four hundred eighty-nine million, five hundred eighty-one thousand, four hundred seventy-eight".