478738231 has 4 divisors (see below), whose sum is σ = 503935000. Its totient is φ = 453541464.

The previous prime is 478738199. The next prime is 478738243. The reversal of 478738231 is 132837874.

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

It is a cyclic number.

It is not a de Polignac number, because 478738231 - 2⁵ = 478738199 is a prime.

It is a super-2 number, since 2×478738231² = 458380587642018722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478738291) 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 in 3 ways as a sum of consecutive naturals, for example, 12598356 + ... + 12598393.

It is an arithmetic number, because the mean of its divisors is an integer number (125983750).

Almost surely, 2^478738231 is an apocalyptic number.

478738231 is a deficient number, since it is larger than the sum of its proper divisors (25196769).

478738231 is a wasteful number, since it uses less digits than its factorization.

478738231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25196768.

The product of its digits is 225792, while the sum is 43.

The square root of 478738231 is about 21880.0875455287. The cubic root of 478738231 is about 782.2868625073.

The spelling of 478738231 in words is "four hundred seventy-eight million, seven hundred thirty-eight thousand, two hundred thirty-one".