1381384782 has 48 divisors (see below), whose sum is σ = 3119996880. Its totient is φ = 441168000.

The previous prime is 1381384729. The next prime is 1381384783. The reversal of 1381384782 is 2874831831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381384783) by changing a digit.

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, 58282 + ... + 78482.

It is an arithmetic number, because the mean of its divisors is an integer number (64999935).

Almost surely, 2^1381384782 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381384782, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1559998440).

1381384782 is an abundant number, since it is smaller than the sum of its proper divisors (1738612098).

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

1381384782 is a wasteful number, since it uses less digits than its factorization.

1381384782 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20369 (or 20366 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 1381384782 is about 37166.9851077539. The cubic root of 1381384782 is about 1113.7085551054.

The spelling of 1381384782 in words is "one billion, three hundred eighty-one million, three hundred eighty-four thousand, seven hundred eighty-two".