3320729 has 8 divisors (see below), whose sum is σ = 3535560. Its totient is φ = 3108096.

The previous prime is 3320699. The next prime is 3320749. The reversal of 3320729 is 9270233.

It can be written as a sum of positive squares in 4 ways, for example, as 846400 + 2474329 = 920^2 + 1573^2 .

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 3320729 - 2¹⁶ = 3255193 is a prime.

It is a super-2 number, since 2×3320729² = 22054482182882, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3320698 and 3320707.

It is not an unprimeable number, because it can be changed into a prime (3320749) 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, 3467 + ... + 4319.

It is an arithmetic number, because the mean of its divisors is an integer number (441945).

Almost surely, 2^3320729 is an apocalyptic number.

It is an amenable number.

3320729 is a deficient number, since it is larger than the sum of its proper divisors (214831).

3320729 is a wasteful number, since it uses less digits than its factorization.

3320729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099.

The product of its (nonzero) digits is 2268, while the sum is 26.

The square root of 3320729 is about 1822.2867502125. The cubic root of 3320729 is about 149.1916366689.

The spelling of 3320729 in words is "three million, three hundred twenty thousand, seven hundred twenty-nine".