478815321 has 8 divisors (see below), whose sum is σ = 639347104. Its totient is φ = 318746880.

The previous prime is 478815301. The next prime is 478815331. The reversal of 478815321 is 123518874.

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

It is not a de Polignac number, because 478815321 - 2¹¹ = 478813273 is a prime.

It is a super-2 number, since 2×478815321² = 458528223248666082, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 478815321.

It is not an unprimeable number, because it can be changed into a prime (478815301) 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, 113416 + ... + 117561.

It is an arithmetic number, because the mean of its divisors is an integer number (79918388).

Almost surely, 2^478815321 is an apocalyptic number.

It is an amenable number.

478815321 is a deficient number, since it is larger than the sum of its proper divisors (160531783).

478815321 is a wasteful number, since it uses less digits than its factorization.

478815321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 231671.

The product of its digits is 53760, while the sum is 39.

The square root of 478815321 is about 21881.8491220463. The cubic root of 478815321 is about 782.3288501418.

The spelling of 478815321 in words is "four hundred seventy-eight million, eight hundred fifteen thousand, three hundred twenty-one".