4278919020 has 144 divisors (see below), whose sum is σ = 12449451168. Its totient is φ = 1097994240.

The previous prime is 4278918991. The next prime is 4278919061. The reversal of 4278919020 is 209198724.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9281590 + ... + 9282050.

It is an arithmetic number, because the mean of its divisors is an integer number (86454522).

Almost surely, 2^4278919020 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4278919020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6224725584).

4278919020 is an abundant number, since it is smaller than the sum of its proper divisors (8170532148).

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

4278919020 is a wasteful number, since it uses less digits than its factorization.

4278919020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 660 (or 621 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 4278919020 is about 65413.4467827526. The cubic root of 4278919020 is about 1623.4715752482.

The spelling of 4278919020 in words is "four billion, two hundred seventy-eight million, nine hundred nineteen thousand, twenty".