1820005528 has 48 divisors (see below), whose sum is σ = 3764852280. Its totient is φ = 824208000.

The previous prime is 1820005507. The next prime is 1820005529. The reversal of 1820005528 is 8255000281.

It is a self number, because there is not a number n which added to its sum of digits gives 1820005528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1820005529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 268663 + ... + 275353.

Almost surely, 2^1820005528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1820005528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1882426140).

1820005528 is an abundant number, since it is smaller than the sum of its proper divisors (1944846752).

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

1820005528 is a wasteful number, since it uses less digits than its factorization.

1820005528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7000 (or 6985 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

The square root of 1820005528 is about 42661.5228045132. The cubic root of 1820005528 is about 1220.9303858804.

The spelling of 1820005528 in words is "one billion, eight hundred twenty million, five thousand, five hundred twenty-eight".