1323347778 has 96 divisors (see below), whose sum is σ = 3121597440. Its totient is φ = 404127360.

The previous prime is 1323347761. The next prime is 1323347783. The reversal of 1323347778 is 8777433231.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 856875 + ... + 858417.

It is an arithmetic number, because the mean of its divisors is an integer number (32516640).

Almost surely, 2^1323347778 is an apocalyptic number.

1323347778 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1323347778, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1560798720).

1323347778 is an abundant number, since it is smaller than the sum of its proper divisors (1798249662).

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

1323347778 is a wasteful number, since it uses less digits than its factorization.

1323347778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664 (or 1661 counting only the distinct ones).

The product of its digits is 592704, while the sum is 45.

The square root of 1323347778 is about 36377.8473524754. The cubic root of 1323347778 is about 1097.8878970224.

The spelling of 1323347778 in words is "one billion, three hundred twenty-three million, three hundred forty-seven thousand, seven hundred seventy-eight".