3439729 has 16 divisors (see below), whose sum is σ = 3856896. Its totient is φ = 3052800.

The previous prime is 3439697. The next prime is 3439747. The reversal of 3439729 is 9279343.

It is a cyclic number.

It is not a de Polignac number, because 3439729 - 2⁵ = 3439697 is a prime.

It is an Ulam number.

Its product of digits (40824) is a multiple of the sum of its prime divisors (216).

It is not an unprimeable number, because it can be changed into a prime (3439129) 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, 32094 + ... + 32200.

It is an arithmetic number, because the mean of its divisors is an integer number (241056).

Almost surely, 2^3439729 is an apocalyptic number.

It is an amenable number.

3439729 is a deficient number, since it is larger than the sum of its proper divisors (417167).

3439729 is a wasteful number, since it uses less digits than its factorization.

3439729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216.

The product of its digits is 40824, while the sum is 37.

The square root of 3439729 is about 1854.6506409564. The cubic root of 3439729 is about 150.9528821017.

The spelling of 3439729 in words is "three million, four hundred thirty-nine thousand, seven hundred twenty-nine".