1840221284 has 12 divisors (see below), whose sum is σ = 3513149808. Its totient is φ = 836464200.

The previous prime is 1840221281. The next prime is 1840221323. The reversal of 1840221284 is 4821220481.

It is a self number, because there is not a number n which added to its sum of digits gives 1840221284.

It is not an unprimeable number, because it can be changed into a prime (1840221281) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 20911562 + ... + 20911649.

It is an arithmetic number, because the mean of its divisors is an integer number (292762484).

Almost surely, 2^1840221284 is an apocalyptic number.

It is an amenable number.

1840221284 is a deficient number, since it is larger than the sum of its proper divisors (1672928524).

1840221284 is a wasteful number, since it uses less digits than its factorization.

1840221284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41823226 (or 41823224 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 1840221284 is about 42897.8004564337. The cubic root of 1840221284 is about 1225.4342559252.

The spelling of 1840221284 in words is "one billion, eight hundred forty million, two hundred twenty-one thousand, two hundred eighty-four".