478778142 has 16 divisors (see below), whose sum is σ = 973254672. Its totient is φ = 156976320.

The previous prime is 478778141. The next prime is 478778159. The reversal of 478778142 is 241877874.

It is a junction number, because it is equal to n+sod(n) for n = 478778091 and 478778100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478778141) 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, 653703 + ... + 654434.

It is an arithmetic number, because the mean of its divisors is an integer number (60828417).

Almost surely, 2^478778142 is an apocalyptic number.

478778142 is an abundant number, since it is smaller than the sum of its proper divisors (494476530).

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

478778142 is a wasteful number, since it uses less digits than its factorization.

478778142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308203.

The product of its digits is 702464, while the sum is 48.

The square root of 478778142 is about 21880.9995658334. Note that the first 3 decimals coincide. The cubic root of 478778142 is about 782.3086008892.

The spelling of 478778142 in words is "four hundred seventy-eight million, seven hundred seventy-eight thousand, one hundred forty-two".