3500220 has 24 divisors (see below), whose sum is σ = 9800784. Its totient is φ = 933376.

The previous prime is 3500207. The next prime is 3500227. The reversal of 3500220 is 220053.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a plaindrome in base 16.

It is a junction number, because it is equal to n+sod(n) for n = 3500196 and 3500205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3500227) 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, 29109 + ... + 29228.

It is an arithmetic number, because the mean of its divisors is an integer number (408366).

Almost surely, 2^3500220 is an apocalyptic number.

3500220 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3500220 is an abundant number, since it is smaller than the sum of its proper divisors (6300564).

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

3500220 is a wasteful number, since it uses less digits than its factorization.

3500220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58349 (or 58347 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 12.

The square root of 3500220 is about 1870.8874899363. The cubic root of 3500220 is about 151.8326297156.

Adding to 3500220 its reverse (220053), we get a palindrome (3720273).

The spelling of 3500220 in words is "three million, five hundred thousand, two hundred twenty".