4391434820 has 12 divisors (see below), whose sum is σ = 9222013164. Its totient is φ = 1756573920.

The previous prime is 4391434819. The next prime is 4391434843. The reversal of 4391434820 is 284341934.

It can be written as a sum of positive squares in 2 ways, for example, as 630311236 + 3761123584 = 25106^2 + 61328^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109785851 + ... + 109785890.

It is an arithmetic number, because the mean of its divisors is an integer number (768501097).

Almost surely, 2^4391434820 is an apocalyptic number.

It is an amenable number.

4391434820 is an abundant number, since it is smaller than the sum of its proper divisors (4830578344).

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

4391434820 is a wasteful number, since it uses less digits than its factorization.

4391434820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219571750 (or 219571748 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The square root of 4391434820 is about 66267.9018831893. The cubic root of 4391434820 is about 1637.5785726142.

The spelling of 4391434820 in words is "four billion, three hundred ninety-one million, four hundred thirty-four thousand, eight hundred twenty".