4778220720 has 160 divisors (see below), whose sum is σ = 18230833152. Its totient is φ = 1008147456.

The previous prime is 4778220701. The next prime is 4778220761. The reversal of 4778220720 is 270228774.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 87552 + ... + 131231.

Almost surely, 2^4778220720 is an apocalyptic number.

4778220720 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4778220720 is an abundant number, since it is smaller than the sum of its proper divisors (13452612432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4778220720 is a wasteful number, since it uses less digits than its factorization.

4778220720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218819 (or 218813 counting only the distinct ones).

The product of its (nonzero) digits is 87808, while the sum is 39.

The square root of 4778220720 is about 69124.6751891103. The cubic root of 4778220720 is about 1684.3101626650.

The spelling of 4778220720 in words is "four billion, seven hundred seventy-eight million, two hundred twenty thousand, seven hundred twenty".