1820005328 has 20 divisors (see below), whose sum is σ = 3529011108. Its totient is φ = 909292800.

The previous prime is 1820005309. The next prime is 1820005337. The reversal of 1820005328 is 8235000281.

It can be written as a sum of positive squares in 2 ways, for example, as 540655504 + 1279349824 = 23252^2 + 35768^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1820005328.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22901 + ... + 64532.

Almost surely, 2^1820005328 is an apocalyptic number.

It is an amenable number.

1820005328 is a deficient number, since it is larger than the sum of its proper divisors (1709005780).

1820005328 is a wasteful number, since it uses less digits than its factorization.

1820005328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88742 (or 88736 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 1820005328 is about 42661.5204604805. The cubic root of 1820005328 is about 1220.9303411578.

The spelling of 1820005328 in words is "one billion, eight hundred twenty million, five thousand, three hundred twenty-eight".