772771228 has 12 divisors (see below), whose sum is σ = 1359358000. Its totient is φ = 384383232.

The previous prime is 772771213. The next prime is 772771229. The reversal of 772771228 is 822177277.

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

772771228 is a modest number, since divided by 771228 gives 772 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (772771229) 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, 499728 + ... + 501271.

Almost surely, 2^772771228 is an apocalyptic number.

It is an amenable number.

772771228 is a deficient number, since it is larger than the sum of its proper divisors (586586772).

772771228 is a wasteful number, since it uses less digits than its factorization.

772771228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001196 (or 1001194 counting only the distinct ones).

The product of its digits is 153664, while the sum is 43.

The square root of 772771228 is about 27798.7630660071. The cubic root of 772771228 is about 917.6639014038.

The spelling of 772771228 in words is "seven hundred seventy-two million, seven hundred seventy-one thousand, two hundred twenty-eight".