1801850 has 12 divisors (see below), whose sum is σ = 3351534. Its totient is φ = 720720.

The previous prime is 1801823. The next prime is 1801853. The reversal of 1801850 is 581081.

It can be written as a sum of positive squares in 3 ways, for example, as 935089 + 866761 = 967^2 + 931^2 .

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

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 17969 + ... + 18068.

2^1801850 is an apocalyptic number.

1801850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1801850 is a deficient number, since it is larger than the sum of its proper divisors (1549684).

1801850 is a wasteful number, since it uses less digits than its factorization.

1801850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36049 (or 36044 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 1801850 is about 1342.3300637325. The cubic root of 1801850 is about 121.6856999893.

The spelling of 1801850 in words is "one million, eight hundred one thousand, eight hundred fifty".