1373821768 has 64 divisors (see below), whose sum is σ = 2888161920. Its totient is φ = 607219200.

The previous prime is 1373821747. The next prime is 1373821769. The reversal of 1373821768 is 8671283731.

It is not an unprimeable number, because it can be changed into a prime (1373821769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1814446 + ... + 1815202.

It is an arithmetic number, because the mean of its divisors is an integer number (45127530).

Almost surely, 2^1373821768 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1373821768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1444080960).

1373821768 is an abundant number, since it is smaller than the sum of its proper divisors (1514340152).

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

1373821768 is a wasteful number, since it uses less digits than its factorization.

1373821768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318 (or 1314 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 1373821768 is about 37065.1017535363. The cubic root of 1373821768 is about 1111.6723345784.

The spelling of 1373821768 in words is "one billion, three hundred seventy-three million, eight hundred twenty-one thousand, seven hundred sixty-eight".