1828920545 has 16 divisors (see below), whose sum is σ = 2270505168. Its totient is φ = 1413181440.

The previous prime is 1828920539. The next prime is 1828920553. The reversal of 1828920545 is 5450298281.

It can be written as a sum of positive squares in 8 ways, for example, as 316021729 + 1512898816 = 17777^2 + 38896^2 .

It is not a de Polignac number, because 1828920545 - 2¹² = 1828916449 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1828920496 and 1828920505.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10736 + ... + 61425.

It is an arithmetic number, because the mean of its divisors is an integer number (141906573).

Almost surely, 2^1828920545 is an apocalyptic number.

It is an amenable number.

1828920545 is a deficient number, since it is larger than the sum of its proper divisors (441584623).

1828920545 is a wasteful number, since it uses less digits than its factorization.

1828920545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72340.

The product of its (nonzero) digits is 230400, while the sum is 44.

The square root of 1828920545 is about 42765.8806176139. The cubic root of 1828920545 is about 1222.9206529393.

The spelling of 1828920545 in words is "one billion, eight hundred twenty-eight million, nine hundred twenty thousand, five hundred forty-five".