478778718 has 64 divisors (see below), whose sum is σ = 1154207232. Its totient is φ = 130606080.

The previous prime is 478778659. The next prime is 478778737. The reversal of 478778718 is 817877874.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 16530 + ... + 35082.

It is an arithmetic number, because the mean of its divisors is an integer number (18034488).

Almost surely, 2^478778718 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 478778718, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (577103616).

478778718 is an abundant number, since it is smaller than the sum of its proper divisors (675428514).

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

478778718 is a wasteful number, since it uses less digits than its factorization.

478778718 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18609.

The product of its digits is 4917248, while the sum is 57.

The square root of 478778718 is about 21881.0127279338. The cubic root of 478778718 is about 782.3089146111.

The spelling of 478778718 in words is "four hundred seventy-eight million, seven hundred seventy-eight thousand, seven hundred eighteen".