478720738 has 4 divisors (see below), whose sum is σ = 718081110. Its totient is φ = 239360368.

The previous prime is 478720733. The next prime is 478720783. The reversal of 478720738 is 837027874.

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., 458944929 + 19775809 = 21423^2 + 4447^2 .

It is not an unprimeable number, because it can be changed into a prime (478720733) by changing a digit.

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 as a sum of consecutive naturals, namely, 119680183 + ... + 119680186.

Almost surely, 2^478720738 is an apocalyptic number.

478720738 is a deficient number, since it is larger than the sum of its proper divisors (239360372).

478720738 is a wasteful number, since it uses less digits than its factorization.

478720738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239360371.

The product of its (nonzero) digits is 526848, while the sum is 46.

The square root of 478720738 is about 21879.6877948475. The cubic root of 478720738 is about 782.2773341890.

The spelling of 478720738 in words is "four hundred seventy-eight million, seven hundred twenty thousand, seven hundred thirty-eight".