1800537660 has 576 divisors, whose sum is σ = 6692474880. Its totient is φ = 403107840.

The previous prime is 1800537659. The next prime is 1800537689. The reversal of 1800537660 is 667350081.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 48663162 + ... + 48663198.

It is an arithmetic number, because the mean of its divisors is an integer number (11618880).

Almost surely, 2^1800537660 is an apocalyptic number.

1800537660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1800537660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3346237440).

1800537660 is an abundant number, since it is smaller than the sum of its proper divisors (4891937220).

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

1800537660 is a wasteful number, since it uses less digits than its factorization.

1800537660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128 (or 114 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 1800537660 is about 42432.7427819603. The cubic root of 1800537660 is about 1216.5615039732.

The spelling of 1800537660 in words is "one billion, eight hundred million, five hundred thirty-seven thousand, six hundred sixty".