1928283821 has 6 divisors (see below), whose sum is σ = 2015767950. Its totient is φ = 1844444888.

The previous prime is 1928283811. The next prime is 1928283829. The reversal of 1928283821 is 1283828291.

It can be written as a sum of positive squares in only one way, i.e., 1179166921 + 749116900 = 34339^2 + 27370^2 .

It is not a de Polignac number, because 1928283821 - 2¹⁸ = 1928021677 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1928283829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1822046 + ... + 1823103.

It is an arithmetic number, because the mean of its divisors is an integer number (335961325).

Almost surely, 2^1928283821 is an apocalyptic number.

It is an amenable number.

1928283821 is a deficient number, since it is larger than the sum of its proper divisors (87484129).

1928283821 is an equidigital number, since it uses as much as digits as its factorization.

1928283821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3645195 (or 3645172 counting only the distinct ones).

The product of its digits is 110592, while the sum is 44.

The square root of 1928283821 is about 43912.2286043421. The cubic root of 1928283821 is about 1244.6779210193.

The spelling of 1928283821 in words is "one billion, nine hundred twenty-eight million, two hundred eighty-three thousand, eight hundred twenty-one".