478939489 has 8 divisors (see below), whose sum is σ = 548248640. Its totient is φ = 409852656.

The previous prime is 478939481. The next prime is 478939493. The reversal of 478939489 is 984939874.

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 478939489 - 2³ = 478939481 is a prime.

It is a super-2 number, since 2×478939489² = 458766068247162242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (478939481) 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, 50934 + ... + 59599.

It is an arithmetic number, because the mean of its divisors is an integer number (68531080).

Almost surely, 2^478939489 is an apocalyptic number.

It is an amenable number.

478939489 is a deficient number, since it is larger than the sum of its proper divisors (69309151).

478939489 is a wasteful number, since it uses less digits than its factorization.

478939489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111159.

The product of its digits is 15676416, while the sum is 61.

The square root of 478939489 is about 21884.6861754972. The cubic root of 478939489 is about 782.3964696802.

The spelling of 478939489 in words is "four hundred seventy-eight million, nine hundred thirty-nine thousand, four hundred eighty-nine".