478164578 has 4 divisors (see below), whose sum is σ = 717246870. Its totient is φ = 239082288.

The previous prime is 478164539. The next prime is 478164581. The reversal of 478164578 is 875461874.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 342139009 + 136025569 = 18497^2 + 11663^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 119541143 + ... + 119541146.

Almost surely, 2^478164578 is an apocalyptic number.

478164578 is a deficient number, since it is larger than the sum of its proper divisors (239082292).

478164578 is a wasteful number, since it uses less digits than its factorization.

478164578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239082291.

The product of its digits is 1505280, while the sum is 50.

The square root of 478164578 is about 21866.9745964091. The cubic root of 478164578 is about 781.9742765330.

The spelling of 478164578 in words is "four hundred seventy-eight million, one hundred sixty-four thousand, five hundred seventy-eight".