1789897220 has 96 divisors (see below), whose sum is σ = 3995744256. Its totient is φ = 672537600.

The previous prime is 1789897211. The next prime is 1789897273. The reversal of 1789897220 is 227989871.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3213182 + ... + 3213738.

It is an arithmetic number, because the mean of its divisors is an integer number (41622336).

Almost surely, 2^1789897220 is an apocalyptic number.

1789897220 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 1789897220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1997872128).

1789897220 is an abundant number, since it is smaller than the sum of its proper divisors (2205847036).

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

1789897220 is a wasteful number, since it uses less digits than its factorization.

1789897220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 741 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 53.

The square root of 1789897220 is about 42307.1769325253. The cubic root of 1789897220 is about 1214.1603076685.

The spelling of 1789897220 in words is "one billion, seven hundred eighty-nine million, eight hundred ninety-seven thousand, two hundred twenty".