3428720333 has 4 divisors (see below), whose sum is σ = 3429056988. Its totient is φ = 3428383680.

The previous prime is 3428720287. The next prime is 3428720353. The reversal of 3428720333 is 3330278243.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1677967369 + 1750752964 = 40963^2 + 41842^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3428720333 is a prime.

It is a super-2 number, since 2×3428720333² = 23512246243855261778, 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 = 3428720293 and 3428720302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3428720353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152558 + ... + 173583.

It is an arithmetic number, because the mean of its divisors is an integer number (857264247).

Almost surely, 2^3428720333 is an apocalyptic number.

It is an amenable number.

3428720333 is a deficient number, since it is larger than the sum of its proper divisors (336655).

3428720333 is a wasteful number, since it uses less digits than its factorization.

3428720333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336654.

The product of its (nonzero) digits is 72576, while the sum is 35.

The square root of 3428720333 is about 58555.2758767304. The cubic root of 3428720333 is about 1507.9167114642.

Adding to 3428720333 its reverse (3330278243), we get a palindrome (6758998576).

The spelling of 3428720333 in words is "three billion, four hundred twenty-eight million, seven hundred twenty thousand, three hundred thirty-three".