3129349806 has 96 divisors (see below), whose sum is σ = 7672579200. Its totient is φ = 913093440.

The previous prime is 3129349787. The next prime is 3129349841. The reversal of 3129349806 is 6089439213.

It is a happy number.

3129349806 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3783565 + ... + 3784391.

It is an arithmetic number, because the mean of its divisors is an integer number (79922700).

Almost surely, 2^3129349806 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3129349806, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3836289600).

3129349806 is an abundant number, since it is smaller than the sum of its proper divisors (4543229394).

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

3129349806 is a wasteful number, since it uses less digits than its factorization.

3129349806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1534 (or 1531 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 3129349806 is about 55940.5917558976. The cubic root of 3129349806 is about 1462.6868964744.

The spelling of 3129349806 in words is "three billion, one hundred twenty-nine million, three hundred forty-nine thousand, eight hundred six".