1228060656 has 40 divisors (see below), whose sum is σ = 3524990160. Its totient is φ = 409353408.

The previous prime is 1228060591. The next prime is 1228060681. The reversal of 1228060656 is 6560608221.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1228060656.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420935 + ... + 1421798.

It is an arithmetic number, because the mean of its divisors is an integer number (88124754).

Almost surely, 2^1228060656 is an apocalyptic number.

1228060656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1228060656 is an abundant number, since it is smaller than the sum of its proper divisors (2296929504).

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

1228060656 is a wasteful number, since it uses less digits than its factorization.

1228060656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2842750 (or 2842738 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 1228060656 is about 35043.6963803763. The cubic root of 1228060656 is about 1070.8778587888.

Adding to 1228060656 its reverse (6560608221), we get a palindrome (7788668877).

The spelling of 1228060656 in words is "one billion, two hundred twenty-eight million, sixty thousand, six hundred fifty-six".