1801333640 has 64 divisors (see below), whose sum is σ = 4163132160. Its totient is φ = 701084160.

The previous prime is 1801333621. The next prime is 1801333669. The reversal of 1801333640 is 463331081.

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, 481457 + ... + 485183.

It is an arithmetic number, because the mean of its divisors is an integer number (65048940).

Almost surely, 2^1801333640 is an apocalyptic number.

1801333640 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 1801333640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2081566080).

1801333640 is an abundant number, since it is smaller than the sum of its proper divisors (2361798520).

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

1801333640 is a wasteful number, since it uses less digits than its factorization.

1801333640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4062 (or 4058 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 1801333640 is about 42442.1210591554. The cubic root of 1801333640 is about 1216.7407496851.

The spelling of 1801333640 in words is "one billion, eight hundred one million, three hundred thirty-three thousand, six hundred forty".