4778448140 has 24 divisors (see below), whose sum is σ = 10041284400. Its totient is φ = 1910132928.

The previous prime is 4778448133. The next prime is 4778448161. The reversal of 4778448140 is 418448774.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46142 + ... + 108101.

It is an arithmetic number, because the mean of its divisors is an integer number (418386850).

Almost surely, 2^4778448140 is an apocalyptic number.

It is an amenable number.

4778448140 is an abundant number, since it is smaller than the sum of its proper divisors (5262836260).

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

4778448140 is a wasteful number, since it uses less digits than its factorization.

4778448140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155801 (or 155799 counting only the distinct ones).

The product of its (nonzero) digits is 802816, while the sum is 47.

The square root of 4778448140 is about 69126.3201682254. The cubic root of 4778448140 is about 1684.3368838905.

The spelling of 4778448140 in words is "four billion, seven hundred seventy-eight million, four hundred forty-eight thousand, one hundred forty".