3506220 has 96 divisors (see below), whose sum is σ = 11235840. Its totient is φ = 907200.

The previous prime is 3506213. The next prime is 3506249. The reversal of 3506220 is 226053.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 3506193 and 3506202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23145 + ... + 23295.

It is an arithmetic number, because the mean of its divisors is an integer number (117040).

Almost surely, 2^3506220 is an apocalyptic number.

3506220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3506220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5617920).

3506220 is an abundant number, since it is smaller than the sum of its proper divisors (7729620).

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

3506220 is a wasteful number, since it uses less digits than its factorization.

3506220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 3506220 is about 1872.4903204022. The cubic root of 3506220 is about 151.9193362404.

The spelling of 3506220 in words is "three million, five hundred six thousand, two hundred twenty".