1814220 has 36 divisors (see below), whose sum is σ = 5503680. Its totient is φ = 483744.

The previous prime is 1814179. The next prime is 1814233. The reversal of 1814220 is 224181.

It is a tau number, because it is divible by the number of its divisors (36).

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 = 1814193 and 1814202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4860 + ... + 5219.

It is an arithmetic number, because the mean of its divisors is an integer number (152880).

2^1814220 is an apocalyptic number.

1814220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1814220 is an abundant number, since it is smaller than the sum of its proper divisors (3689460).

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

1814220 is a wasteful number, since it uses less digits than its factorization.

1814220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10094 (or 10089 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1814220 is about 1346.9298422709. The cubic root of 1814220 is about 121.9635293655.

The spelling of 1814220 in words is "one million, eight hundred fourteen thousand, two hundred twenty".