1919728382 has 64 divisors (see below), whose sum is σ = 3508807680. Its totient is φ = 775785600.

The previous prime is 1919728381. The next prime is 1919728463. The reversal of 1919728382 is 2838279191.

It is a self number, because there is not a number n which added to its sum of digits gives 1919728382.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1919728381) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2597369 + ... + 2598107.

It is an arithmetic number, because the mean of its divisors is an integer number (54825120).

Almost surely, 2^1919728382 is an apocalyptic number.

1919728382 is a deficient number, since it is larger than the sum of its proper divisors (1589079298).

1919728382 is a wasteful number, since it uses less digits than its factorization.

1919728382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1089.

The product of its digits is 435456, while the sum is 50.

The square root of 1919728382 is about 43814.7050885887. The cubic root of 1919728382 is about 1242.8343898759.

The spelling of 1919728382 in words is "one billion, nine hundred nineteen million, seven hundred twenty-eight thousand, three hundred eighty-two".