3430729 has 8 divisors (see below), whose sum is σ = 3570120. Its totient is φ = 3292800.

The previous prime is 3430727. The next prime is 3430771. The reversal of 3430729 is 9270343.

It can be written as a sum of positive squares in 4 ways, for example, as 63504 + 3367225 = 252^2 + 1835^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3430729 - 2¹ = 3430727 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3430697 and 3430706.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3430727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7939 + ... + 8359.

It is an arithmetic number, because the mean of its divisors is an integer number (446265).

Almost surely, 2^3430729 is an apocalyptic number.

It is an amenable number.

3430729 is a deficient number, since it is larger than the sum of its proper divisors (139391).

3430729 is a wasteful number, since it uses less digits than its factorization.

3430729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 731.

The product of its (nonzero) digits is 4536, while the sum is 28.

The square root of 3430729 is about 1852.2227187895. Note that the first 3 decimals coincide. The cubic root of 3430729 is about 150.8211117827.

The spelling of 3430729 in words is "three million, four hundred thirty thousand, seven hundred twenty-nine".