777215228 has 6 divisors (see below), whose sum is σ = 1360126656. Its totient is φ = 388607612.

The previous prime is 777215221. The next prime is 777215261. The reversal of 777215228 is 822512777.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (777215221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97151900 + ... + 97151907.

It is an arithmetic number, because the mean of its divisors is an integer number (226687776).

Almost surely, 2^777215228 is an apocalyptic number.

It is an amenable number.

777215228 is a deficient number, since it is larger than the sum of its proper divisors (582911428).

777215228 is a wasteful number, since it uses less digits than its factorization.

777215228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194303811 (or 194303809 counting only the distinct ones).

The product of its digits is 109760, while the sum is 41.

The square root of 777215228 is about 27878.5800929674. The cubic root of 777215228 is about 919.4196197675.

The spelling of 777215228 in words is "seven hundred seventy-seven million, two hundred fifteen thousand, two hundred twenty-eight".