478994042 has 4 divisors (see below), whose sum is σ = 718491066. Its totient is φ = 239497020.

The previous prime is 478994041. The next prime is 478994063. The reversal of 478994042 is 240499874.

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., 326199721 + 152794321 = 18061^2 + 12361^2 .

It is not an unprimeable number, because it can be changed into a prime (478994041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119748509 + ... + 119748512.

Almost surely, 2^478994042 is an apocalyptic number.

478994042 is a deficient number, since it is larger than the sum of its proper divisors (239497024).

478994042 is a wasteful number, since it uses less digits than its factorization.

478994042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239497023.

The product of its (nonzero) digits is 580608, while the sum is 47.

The square root of 478994042 is about 21885.9325138318. The cubic root of 478994042 is about 782.4261745143.

The spelling of 478994042 in words is "four hundred seventy-eight million, nine hundred ninety-four thousand, forty-two".