1222445780 has 48 divisors (see below), whose sum is σ = 2616546240. Its totient is φ = 479605248.

The previous prime is 1222445779. The next prime is 1222445797. The reversal of 1222445780 is 875442221.

It is a self number, because there is not a number n which added to its sum of digits gives 1222445780.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 698867 + ... + 700613.

It is an arithmetic number, because the mean of its divisors is an integer number (54511380).

Almost surely, 2^1222445780 is an apocalyptic number.

1222445780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222445780 is an abundant number, since it is smaller than the sum of its proper divisors (1394100460).

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

1222445780 is a wasteful number, since it uses less digits than its factorization.

1222445780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408 (or 2406 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 35.

The square root of 1222445780 is about 34963.4921024774. The cubic root of 1222445780 is about 1069.2432941378.

The spelling of 1222445780 in words is "one billion, two hundred twenty-two million, four hundred forty-five thousand, seven hundred eighty".