1840220220 has 48 divisors (see below), whose sum is σ = 5278297248. Its totient is φ = 478755840.

The previous prime is 1840220183. The next prime is 1840220231. The reversal of 1840220220 is 220220481.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371569 + ... + 376488.

It is an arithmetic number, because the mean of its divisors is an integer number (109964526).

Almost surely, 2^1840220220 is an apocalyptic number.

1840220220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1840220220 is an abundant number, since it is smaller than the sum of its proper divisors (3438077028).

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

1840220220 is a wasteful number, since it uses less digits than its factorization.

1840220220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748110 (or 748108 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 1840220220 is about 42897.7880548636. The cubic root of 1840220220 is about 1225.4340197467.

The spelling of 1840220220 in words is "one billion, eight hundred forty million, two hundred twenty thousand, two hundred twenty".