4978406218 has 8 divisors (see below), whose sum is σ = 7468056612. Its totient is φ = 2489054016.

The previous prime is 4978406197. The next prime is 4978406233. The reversal of 4978406218 is 8126048794.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4274936689 + 703469529 = 65383^2 + 26523^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26655 + ... + 103282.

Almost surely, 2^4978406218 is an apocalyptic number.

4978406218 is a deficient number, since it is larger than the sum of its proper divisors (2489650394).

4978406218 is a wasteful number, since it uses less digits than its factorization.

4978406218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149096.

The product of its (nonzero) digits is 774144, while the sum is 49.

The square root of 4978406218 is about 70557.8218059486. The cubic root of 4978406218 is about 1707.5107378634.

The spelling of 4978406218 in words is "four billion, nine hundred seventy-eight million, four hundred six thousand, two hundred eighteen".