1980217822 has 8 divisors (see below), whose sum is σ = 3240356472. Its totient is φ = 900099000.

The previous prime is 1980217801. The next prime is 1980217823. The reversal of 1980217822 is 2287120891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980217823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45004929 + ... + 45004972.

It is an arithmetic number, because the mean of its divisors is an integer number (405044559).

Almost surely, 2^1980217822 is an apocalyptic number.

1980217822 is a deficient number, since it is larger than the sum of its proper divisors (1260138650).

1980217822 is a wasteful number, since it uses less digits than its factorization.

1980217822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90009914.

The product of its (nonzero) digits is 32256, while the sum is 40.

The square root of 1980217822 is about 44499.6384479694. The cubic root of 1980217822 is about 1255.7532812048.

The spelling of 1980217822 in words is "one billion, nine hundred eighty million, two hundred seventeen thousand, eight hundred twenty-two".