3129738 has 16 divisors (see below), whose sum is σ = 6475680. Its totient is φ = 1007216.

The previous prime is 3129733. The next prime is 3129757. The reversal of 3129738 is 8379213.

3129738 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 3129699 and 3129708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3129733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8820 + ... + 9167.

It is an arithmetic number, because the mean of its divisors is an integer number (404730).

Almost surely, 2^3129738 is an apocalyptic number.

3129738 is an abundant number, since it is smaller than the sum of its proper divisors (3345942).

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

3129738 is a wasteful number, since it uses less digits than its factorization.

3129738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18021.

The product of its digits is 9072, while the sum is 33.

The square root of 3129738 is about 1769.1065541680. The cubic root of 3129738 is about 146.2747375790.

The spelling of 3129738 in words is "three million, one hundred twenty-nine thousand, seven hundred thirty-eight".