1997232872 has 16 divisors (see below), whose sum is σ = 3745336740. Its totient is φ = 998476416.

The previous prime is 1997232869. The next prime is 1997232917. The reversal of 1997232872 is 2782327991.

It can be written as a sum of positive squares in 2 ways, for example, as 1618774756 + 378458116 = 40234^2 + 19454^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1997232872.

It is an unprimeable number.

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, 67268 + ... + 92300.

Almost surely, 2^1997232872 is an apocalyptic number.

It is an amenable number.

1997232872 is a deficient number, since it is larger than the sum of its proper divisors (1748103868).

1997232872 is a wasteful number, since it uses less digits than its factorization.

1997232872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35012 (or 35008 counting only the distinct ones).

The product of its digits is 762048, while the sum is 50.

The square root of 1997232872 is about 44690.4114100553. The cubic root of 1997232872 is about 1259.3397212414.

The spelling of 1997232872 in words is "one billion, nine hundred ninety-seven million, two hundred thirty-two thousand, eight hundred seventy-two".