478821814 has 4 divisors (see below), whose sum is σ = 718232724. Its totient is φ = 239410906.

The previous prime is 478821767. The next prime is 478821839. The reversal of 478821814 is 418128874.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 418128874 = 2 ⋅209064437.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119705452 + ... + 119705455.

It is an arithmetic number, because the mean of its divisors is an integer number (179558181).

Almost surely, 2^478821814 is an apocalyptic number.

478821814 is a deficient number, since it is larger than the sum of its proper divisors (239410910).

478821814 is a wasteful number, since it uses less digits than its factorization.

478821814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239410909.

The product of its digits is 114688, while the sum is 43.

The square root of 478821814 is about 21881.9974865185. The cubic root of 478821814 is about 782.3323863961.

The spelling of 478821814 in words is "four hundred seventy-eight million, eight hundred twenty-one thousand, eight hundred fourteen".