1381729344 has 112 divisors (see below), whose sum is σ = 3730995840. Its totient is φ = 451215360.

The previous prime is 1381729337. The next prime is 1381729351. The reversal of 1381729344 is 4439271831.

It is an interprime number because it is at equal distance from previous prime (1381729337) and next prime (1381729351).

It is a junction number, because it is equal to n+sod(n) for n = 1381729296 and 1381729305.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2155264 + ... + 2155904.

Almost surely, 2^1381729344 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 1381729344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1865497920).

1381729344 is an abundant number, since it is smaller than the sum of its proper divisors (2349266496).

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

1381729344 is a wasteful number, since it uses less digits than its factorization.

1381729344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868 (or 858 counting only the distinct ones).

The product of its digits is 145152, while the sum is 42.

The square root of 1381729344 is about 37171.6201422537. The cubic root of 1381729344 is about 1113.8011457074.

The spelling of 1381729344 in words is "one billion, three hundred eighty-one million, seven hundred twenty-nine thousand, three hundred forty-four".