1224556780 has 12 divisors (see below), whose sum is σ = 2571569280. Its totient is φ = 489822704.

The previous prime is 1224556747. The next prime is 1224556787. The reversal of 1224556780 is 876554221.

It is not an unprimeable number, because it can be changed into a prime (1224556787) 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, 30613900 + ... + 30613939.

It is an arithmetic number, because the mean of its divisors is an integer number (214297440).

Almost surely, 2^1224556780 is an apocalyptic number.

1224556780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1224556780 is an abundant number, since it is smaller than the sum of its proper divisors (1347012500).

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

1224556780 is a wasteful number, since it uses less digits than its factorization.

1224556780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61227848 (or 61227846 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 40.

The square root of 1224556780 is about 34993.6677128877. The cubic root of 1224556780 is about 1069.8584201412.

The spelling of 1224556780 in words is "one billion, two hundred twenty-four million, five hundred fifty-six thousand, seven hundred eighty".