1789138220 has 24 divisors (see below), whose sum is σ = 3758735904. Its totient is φ = 715360896.

The previous prime is 1789138217. The next prime is 1789138271. The reversal of 1789138220 is 228319871.

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 7 ways as a sum of consecutive naturals, for example, 35249 + ... + 69431.

It is an arithmetic number, because the mean of its divisors is an integer number (156613996).

Almost surely, 2^1789138220 is an apocalyptic number.

1789138220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1789138220 is an abundant number, since it is smaller than the sum of its proper divisors (1969597684).

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

1789138220 is a wasteful number, since it uses less digits than its factorization.

1789138220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36809 (or 36807 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 1789138220 is about 42298.2058721171. The cubic root of 1789138220 is about 1213.9886631827.

The spelling of 1789138220 in words is "one billion, seven hundred eighty-nine million, one hundred thirty-eight thousand, two hundred twenty".