1223786798 has 12 divisors (see below), whose sum is σ = 1987748928. Its totient is φ = 564824520.

The previous prime is 1223786779. The next prime is 1223786807. The reversal of 1223786798 is 8976873221.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 1809998 + ... + 1810673.

It is an arithmetic number, because the mean of its divisors is an integer number (165645744).

Almost surely, 2^1223786798 is an apocalyptic number.

1223786798 is a deficient number, since it is larger than the sum of its proper divisors (763962130).

1223786798 is a wasteful number, since it uses less digits than its factorization.

1223786798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3620699 (or 3620686 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 53.

The square root of 1223786798 is about 34982.6642495965. The cubic root of 1223786798 is about 1069.6341364226.

The spelling of 1223786798 in words is "one billion, two hundred twenty-three million, seven hundred eighty-six thousand, seven hundred ninety-eight".