4872859821 has 24 divisors (see below), whose sum is σ = 7709602680. Its totient is φ = 2952047616.

The previous prime is 4872859819. The next prime is 4872859877. The reversal of 4872859821 is 1289582784.

4872859821 is a `hidden beast` number, since 4 + 8 + 7 + 28 + 598 + 21 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 240560100 + 4632299721 = 15510^2 + 68061^2 .

It is not a de Polignac number, because 4872859821 - 2¹ = 4872859819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4872859891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 544680 + ... + 553553.

It is an arithmetic number, because the mean of its divisors is an integer number (321233445).

Almost surely, 2^4872859821 is an apocalyptic number.

It is an amenable number.

4872859821 is a deficient number, since it is larger than the sum of its proper divisors (2836742859).

4872859821 is a wasteful number, since it uses less digits than its factorization.

4872859821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098285 (or 1098282 counting only the distinct ones).

The product of its digits is 2580480, while the sum is 54.

The square root of 4872859821 is about 69805.8723962390. The cubic root of 4872859821 is about 1695.3575552897.

The spelling of 4872859821 in words is "four billion, eight hundred seventy-two million, eight hundred fifty-nine thousand, eight hundred twenty-one".