771228 has 48 divisors (see below), whose sum is σ = 2064160. Its totient is φ = 248832.

The previous prime is 771227. The next prime is 771233. The reversal of 771228 is 822177.

771228 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (771227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3900 + ... + 4092.

2⁷⁷¹²²⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 771228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1032080).

771228 is an abundant number, since it is smaller than the sum of its proper divisors (1292932).

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

771228 is a wasteful number, since it uses less digits than its factorization.

771228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243 (or 235 counting only the distinct ones).

The product of its digits is 1568, while the sum is 27.

The square root of 771228 is about 878.1958779225. The cubic root of 771228 is about 91.7052634525.

It can be divided in two parts, 771 and 228, that added together give a palindrome (999).

The spelling of 771228 in words is "seven hundred seventy-one thousand, two hundred twenty-eight".