1850220 has 72 divisors (see below), whose sum is σ = 5918640. Its totient is φ = 466560.

The previous prime is 1850179. The next prime is 1850227. The reversal of 1850220 is 220581.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1850193 and 1850202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1850227) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3150 + ... + 3690.

2^1850220 is an apocalyptic number.

1850220 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 1850220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2959320).

1850220 is an abundant number, since it is smaller than the sum of its proper divisors (4068420).

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

1850220 is a wasteful number, since it uses less digits than its factorization.

1850220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 575 (or 570 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 1850220 is about 1360.2279220778. The cubic root of 1850220 is about 122.7649685926.

The spelling of 1850220 in words is "one million, eight hundred fifty thousand, two hundred twenty".