478284389 has 8 divisors (see below), whose sum is σ = 526932000. Its totient is φ = 430498000.

The previous prime is 478284383. The next prime is 478284419. The reversal of 478284389 is 983482874.

It is a happy number.

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 478284389 - 2²⁰ = 477235813 is a prime.

It is a super-2 number, since 2×478284389² = 457511913522206642, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 478284389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478284383) 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, 214139 + ... + 216360.

It is an arithmetic number, because the mean of its divisors is an integer number (65866500).

Almost surely, 2^478284389 is an apocalyptic number.

It is an amenable number.

478284389 is a deficient number, since it is larger than the sum of its proper divisors (48647611).

478284389 is a wasteful number, since it uses less digits than its factorization.

478284389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430611.

The product of its digits is 3096576, while the sum is 53.

The square root of 478284389 is about 21869.7139670367. The cubic root of 478284389 is about 782.0395827061.

The spelling of 478284389 in words is "four hundred seventy-eight million, two hundred eighty-four thousand, three hundred eighty-nine".