1801860 has 48 divisors (see below), whose sum is σ = 5140800. Its totient is φ = 471424.

The previous prime is 1801853. The next prime is 1801867. The reversal of 1801860 is 681081.

It is an interprime number because it is at equal distance from previous prime (1801853) and next prime (1801867).

It is a self number, because there is not a number n which added to its sum of digits gives 1801860.

It is not an unprimeable number, because it can be changed into a prime (1801867) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3286 + ... + 3794.

It is an arithmetic number, because the mean of its divisors is an integer number (107100).

2^1801860 is an apocalyptic number.

1801860 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 1801860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2570400).

1801860 is an abundant number, since it is smaller than the sum of its proper divisors (3338940).

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

1801860 is a wasteful number, since it uses less digits than its factorization.

1801860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 578 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 24.

The square root of 1801860 is about 1342.3337885936. Note that the first 3 decimals coincide. The cubic root of 1801860 is about 121.6859251014.

The spelling of 1801860 in words is "one million, eight hundred one thousand, eight hundred sixty".