478638554 has 4 divisors (see below), whose sum is σ = 717957834. Its totient is φ = 239319276.

The previous prime is 478638541. The next prime is 478638569. The reversal of 478638554 is 455836874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 455836874 = 2 ⋅227918437.

It can be written as a sum of positive squares in only one way, i.e., 316662025 + 161976529 = 17795^2 + 12727^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119659637 + ... + 119659640.

Almost surely, 2^478638554 is an apocalyptic number.

478638554 is a deficient number, since it is larger than the sum of its proper divisors (239319280).

478638554 is a wasteful number, since it uses less digits than its factorization.

478638554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239319279.

The product of its digits is 3225600, while the sum is 50.

The square root of 478638554 is about 21877.8096252801. The cubic root of 478638554 is about 782.2325660151.

The spelling of 478638554 in words is "four hundred seventy-eight million, six hundred thirty-eight thousand, five hundred fifty-four".