7220220 has 48 divisors (see below), whose sum is σ = 23106048. Its totient is φ = 1650240.

The previous prime is 7220219. The next prime is 7220231. The reversal of 7220220 is 220227.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 7220220.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8176 + ... + 9015.

It is an arithmetic number, because the mean of its divisors is an integer number (481376).

Almost surely, 2^7220220 is an apocalyptic number.

7220220 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7220220 is an abundant number, since it is smaller than the sum of its proper divisors (15885828).

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

7220220 is a wasteful number, since it uses less digits than its factorization.

7220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17210 (or 17208 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 15.

The square root of 7220220 is about 2687.0467059580. The cubic root of 7220220 is about 193.2784690403.

Adding to 7220220 its reverse (220227), we get a palindrome (7440447).

The spelling of 7220220 in words is "seven million, two hundred twenty thousand, two hundred twenty".