478778162 has 8 divisors (see below), whose sum is σ = 721813356. Its totient is φ = 238173712.

The previous prime is 478778159. The next prime is 478778213. The reversal of 478778162 is 261877874.

It is a Cunningham number, because it is equal to 21881²+1.

It can be written as a sum of positive squares in 2 ways, for example, as 478778161 + 1 = 21881^2 + 1^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 478778162.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 607193 + ... + 607980.

Almost surely, 2^478778162 is an apocalyptic number.

478778162 is a deficient number, since it is larger than the sum of its proper divisors (243035194).

478778162 is a wasteful number, since it uses less digits than its factorization.

478778162 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1215372.

The product of its digits is 1053696, while the sum is 50.

The square root of 478778162 is about 21881.0000228509. Note that the first 4 decimals coincide. The cubic root of 478778162 is about 782.3086117823.

The spelling of 478778162 in words is "four hundred seventy-eight million, seven hundred seventy-eight thousand, one hundred sixty-two".