478639724 has 6 divisors (see below), whose sum is σ = 837619524. Its totient is φ = 239319860.

The previous prime is 478639717. The next prime is 478639727. The reversal of 478639724 is 427936874.

It is not an unprimeable number, because it can be changed into a prime (478639727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 59829962 + ... + 59829969.

It is an arithmetic number, because the mean of its divisors is an integer number (139603254).

Almost surely, 2^478639724 is an apocalyptic number.

It is an amenable number.

478639724 is a deficient number, since it is larger than the sum of its proper divisors (358979800).

478639724 is a wasteful number, since it uses less digits than its factorization.

478639724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119659935 (or 119659933 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 50.

The square root of 478639724 is about 21877.8363646865. The cubic root of 478639724 is about 782.2332033863.

The spelling of 478639724 in words is "four hundred seventy-eight million, six hundred thirty-nine thousand, seven hundred twenty-four".