775220 has 24 divisors (see below), whose sum is σ = 1651104. Its totient is φ = 305696.

The previous prime is 775193. The next prime is 775237. The reversal of 775220 is 22577.

775220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

775220 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1427 + ... + 1893.

It is an arithmetic number, because the mean of its divisors is an integer number (68796).

2⁷⁷⁵²²⁰ is an apocalyptic number.

It is an amenable number.

775220 is an abundant number, since it is smaller than the sum of its proper divisors (875884).

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

775220 is a wasteful number, since it uses less digits than its factorization.

775220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559 (or 557 counting only the distinct ones).

The product of its (nonzero) digits is 980, while the sum is 23.

The square root of 775220 is about 880.4657858202. The cubic root of 775220 is about 91.8632182896.

Adding to 775220 its reverse (22577), we get a palindrome (797797).

The spelling of 775220 in words is "seven hundred seventy-five thousand, two hundred twenty".