1828939393 has 4 divisors (see below), whose sum is σ = 1858922068. Its totient is φ = 1798956720.

The previous prime is 1828939303. The next prime is 1828939397. The reversal of 1828939393 is 3939398281.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 851939344 + 977000049 = 29188^2 + 31257^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1828939393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1828939397) 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 3 ways as a sum of consecutive naturals, for example, 14991246 + ... + 14991367.

It is an arithmetic number, because the mean of its divisors is an integer number (464730517).

Almost surely, 2^1828939393 is an apocalyptic number.

It is an amenable number.

1828939393 is a deficient number, since it is larger than the sum of its proper divisors (29982675).

1828939393 is an equidigital number, since it uses as much as digits as its factorization.

1828939393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29982674.

The product of its digits is 2519424, while the sum is 55.

The square root of 1828939393 is about 42766.1009796311. The cubic root of 1828939393 is about 1222.9248538743.

The spelling of 1828939393 in words is "one billion, eight hundred twenty-eight million, nine hundred thirty-nine thousand, three hundred ninety-three".