3201871806 has 60 divisors (see below), whose sum is σ = 8041707960. Its totient is φ = 901935720.

The previous prime is 3201871793. The next prime is 3201871807. The reversal of 3201871806 is 6081781023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3201871807) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 45096751 + ... + 45096821.

It is an arithmetic number, because the mean of its divisors is an integer number (134028466).

Almost surely, 2^3201871806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3201871806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4020853980).

3201871806 is an abundant number, since it is smaller than the sum of its proper divisors (4839836154).

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

3201871806 is an frugal number, since it uses more digits than its factorization.

3201871806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299 (or 83 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 3201871806 is about 56585.0846601823. The cubic root of 3201871806 is about 1473.8998681295.

The spelling of 3201871806 in words is "three billion, two hundred one million, eight hundred seventy-one thousand, eight hundred six".