3129438 has 32 divisors (see below), whose sum is σ = 6876576. Its totient is φ = 943488.

The previous prime is 3129431. The next prime is 3129439. The reversal of 3129438 is 8349213.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3129431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3756 + ... + 4512.

It is an arithmetic number, because the mean of its divisors is an integer number (214893).

Almost surely, 2^3129438 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3129438, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3438288).

3129438 is an abundant number, since it is smaller than the sum of its proper divisors (3747138).

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

3129438 is a wasteful number, since it uses less digits than its factorization.

3129438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828.

The product of its digits is 5184, while the sum is 30.

The square root of 3129438 is about 1769.0217635744. The cubic root of 3129438 is about 146.2700637241.

It can be divided in two parts, 312 and 9438, that multiplied together give a square (2944656 = 1716²).

The spelling of 3129438 in words is "three million, one hundred twenty-nine thousand, four hundred thirty-eight".