1928439396 has 81 divisors (see below), whose sum is σ = 5287877049. Its totient is φ = 592312032.

The previous prime is 1928439391. The next prime is 1928439407. The reversal of 1928439396 is 6939348291.

The square root of 1928439396 is 43914.

It is a perfect power (a square), and thus also a powerful number.

1928439396 is a `hidden beast` number, since 1 + 92 + 84 + 393 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 285272100 + 1643167296 = 16890^2 + 40536^2 .

It is not an unprimeable number, because it can be changed into a prime (1928439391) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 3425011 + ... + 3425573.

Almost surely, 2^1928439396 is an apocalyptic number.

1928439396 is the 43914-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1928439396

1928439396 is an abundant number, since it is smaller than the sum of its proper divisors (3359437653).

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

1928439396 is a wasteful number, since it uses less digits than its factorization.

1928439396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1162 (or 581 counting only the distinct ones).

The product of its digits is 2519424, while the sum is 54.

The cubic root of 1928439396 is about 1244.7113938857.

The spelling of 1928439396 in words is "one billion, nine hundred twenty-eight million, four hundred thirty-nine thousand, three hundred ninety-six".