1222778466 has 48 divisors (see below), whose sum is σ = 3260746944. Its totient is φ = 322490592.

The previous prime is 1222778449. The next prime is 1222778507. The reversal of 1222778466 is 6648772221.

It is a happy number.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

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 23 ways as a sum of consecutive naturals, for example, 371616 + ... + 374891.

It is an arithmetic number, because the mean of its divisors is an integer number (67932228).

Almost surely, 2^1222778466 is an apocalyptic number.

1222778466 is an abundant number, since it is smaller than the sum of its proper divisors (2037968478).

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

1222778466 is a wasteful number, since it uses less digits than its factorization.

1222778466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 746535 (or 746532 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 1222778466 is about 34968.2493985615. The cubic root of 1222778466 is about 1069.3402827639.

The spelling of 1222778466 in words is "one billion, two hundred twenty-two million, seven hundred seventy-eight thousand, four hundred sixty-six".