1227277656 has 160 divisors (see below), whose sum is σ = 3776129280. Its totient is φ = 369316800.

The previous prime is 1227277643. The next prime is 1227277661. The reversal of 1227277656 is 6567727221.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 1189861 + ... + 1190891.

It is an arithmetic number, because the mean of its divisors is an integer number (23600808).

Almost surely, 2^1227277656 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 1227277656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1888064640).

1227277656 is an abundant number, since it is smaller than the sum of its proper divisors (2548851624).

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

1227277656 is a wasteful number, since it uses less digits than its factorization.

1227277656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1227 (or 1214 counting only the distinct ones).

The product of its digits is 493920, while the sum is 45.

The square root of 1227277656 is about 35032.5228323625. The cubic root of 1227277656 is about 1070.6502164953.

The spelling of 1227277656 in words is "one billion, two hundred twenty-seven million, two hundred seventy-seven thousand, six hundred fifty-six".