1997831022 has 32 divisors (see below), whose sum is σ = 4499518464. Its totient is φ = 585873600.

The previous prime is 1997831009. The next prime is 1997831023. The reversal of 1997831022 is 2201387991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997831023) 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 15 ways as a sum of consecutive naturals, for example, 486183 + ... + 490274.

It is an arithmetic number, because the mean of its divisors is an integer number (140609952).

Almost surely, 2^1997831022 is an apocalyptic number.

1997831022 is an abundant number, since it is smaller than the sum of its proper divisors (2501687442).

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

1997831022 is a wasteful number, since it uses less digits than its factorization.

1997831022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976504.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1997831022 is about 44697.1030604893. The cubic root of 1997831022 is about 1259.4654283098.

The spelling of 1997831022 in words is "one billion, nine hundred ninety-seven million, eight hundred thirty-one thousand, twenty-two".