1222806780 has 240 divisors, whose sum is σ = 4266603264. Its totient is φ = 291133440.

The previous prime is 1222806751. The next prime is 1222806829. The reversal of 1222806780 is 876082221.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 651924 + ... + 653796.

Almost surely, 2^1222806780 is an apocalyptic number.

1222806780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222806780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2133301632).

1222806780 is an abundant number, since it is smaller than the sum of its proper divisors (3043796484).

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

1222806780 is a wasteful number, since it uses less digits than its factorization.

1222806780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1938 (or 1927 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1222806780 is about 34968.6542491987. The cubic root of 1222806780 is about 1069.3485363895.

The spelling of 1222806780 in words is "one billion, two hundred twenty-two million, eight hundred six thousand, seven hundred eighty".