7774220 has 12 divisors (see below), whose sum is σ = 16325904. Its totient is φ = 3109680.

The previous prime is 7774213. The next prime is 7774229. The reversal of 7774220 is 224777.

7774220 is an esthetic number in base 6, because in such base its adjacent digits differ by 1.

It is a nialpdrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (7774229) 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, 194336 + ... + 194375.

It is an arithmetic number, because the mean of its divisors is an integer number (1360492).

Almost surely, 2^7774220 is an apocalyptic number.

It is an amenable number.

7774220 is an abundant number, since it is smaller than the sum of its proper divisors (8551684).

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

7774220 is a wasteful number, since it uses less digits than its factorization.

7774220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 388720 (or 388718 counting only the distinct ones).

The product of its (nonzero) digits is 5488, while the sum is 29.

The square root of 7774220 is about 2788.2288284859. The cubic root of 7774220 is about 198.1005169321.

Adding to 7774220 its reverse (224777), we get a palindrome (7998997).

The spelling of 7774220 in words is "seven million, seven hundred seventy-four thousand, two hundred twenty".