3505820 has 12 divisors (see below), whose sum is σ = 7362264. Its totient is φ = 1402320.

The previous prime is 3505819. The next prime is 3505829. The reversal of 3505820 is 285053.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3505829) 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, 87626 + ... + 87665.

It is an arithmetic number, because the mean of its divisors is an integer number (613522).

Almost surely, 2^3505820 is an apocalyptic number.

It is an amenable number.

3505820 is an abundant number, since it is smaller than the sum of its proper divisors (3856444).

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

3505820 is a wasteful number, since it uses less digits than its factorization.

3505820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175300 (or 175298 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 3505820 is about 1872.3835077248. The cubic root of 3505820 is about 151.9135588842.

The spelling of 3505820 in words is "three million, five hundred five thousand, eight hundred twenty".