1800532644 has 96 divisors (see below), whose sum is σ = 4651637760. Its totient is φ = 539510400.

The previous prime is 1800532639. The next prime is 1800532649. The reversal of 1800532644 is 4462350081.

It is an interprime number because it is at equal distance from previous prime (1800532639) and next prime (1800532649).

It is not an unprimeable number, because it can be changed into a prime (1800532649) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 685654 + ... + 688274.

It is an arithmetic number, because the mean of its divisors is an integer number (48454560).

Almost surely, 2^1800532644 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 1800532644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2325818880).

1800532644 is an abundant number, since it is smaller than the sum of its proper divisors (2851105116).

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

1800532644 is a wasteful number, since it uses less digits than its factorization.

1800532644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801 (or 2799 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1800532644 is about 42432.6836766189. The cubic root of 1800532644 is about 1216.5603742591.

The spelling of 1800532644 in words is "one billion, eight hundred million, five hundred thirty-two thousand, six hundred forty-four".