1801856 has 32 divisors (see below), whose sum is σ = 4104480. Its totient is φ = 771840.

The previous prime is 1801853. The next prime is 1801867. The reversal of 1801856 is 6581081.

1801856 is nontrivially palindromic in base 13.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (1801853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 110 + ... + 1901.

It is an arithmetic number, because the mean of its divisors is an integer number (128265).

2^1801856 is an apocalyptic number.

1801856 is a gapful number since it is divisible by the number (16) 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 1801856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2052240).

1801856 is an abundant number, since it is smaller than the sum of its proper divisors (2302624).

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

1801856 is an equidigital number, since it uses as much as digits as its factorization.

1801856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2032 (or 2020 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 29.

The square root of 1801856 is about 1342.3322986504. The cubic root of 1801856 is about 121.6858350567.

The spelling of 1801856 in words is "one million, eight hundred one thousand, eight hundred fifty-six".