4779971920 has 20 divisors (see below), whose sum is σ = 11113434900. Its totient is φ = 1911988736.

The previous prime is 4779971879. The next prime is 4779971927. The reversal of 4779971920 is 291799774.

It can be written as a sum of positive squares in 2 ways, for example, as 1407150144 + 3372821776 = 37512^2 + 58076^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4779971927) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29874745 + ... + 29874904.

It is an arithmetic number, because the mean of its divisors is an integer number (555671745).

Almost surely, 2^4779971920 is an apocalyptic number.

4779971920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

4779971920 is an abundant number, since it is smaller than the sum of its proper divisors (6333462980).

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

4779971920 is a wasteful number, since it uses less digits than its factorization.

4779971920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59749662 (or 59749656 counting only the distinct ones).

The product of its (nonzero) digits is 2000376, while the sum is 55.

The square root of 4779971920 is about 69137.3409960204. The cubic root of 4779971920 is about 1684.5159019885.

The spelling of 4779971920 in words is "four billion, seven hundred seventy-nine million, nine hundred seventy-one thousand, nine hundred twenty".