1997486188 has 12 divisors (see below), whose sum is σ = 3679579960. Its totient is φ = 946177632.

The previous prime is 1997486171. The next prime is 1997486189. The reversal of 1997486188 is 8816847991.

It is not an unprimeable number, because it can be changed into a prime (1997486189) by changing a digit.

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, 13141281 + ... + 13141432.

Almost surely, 2^1997486188 is an apocalyptic number.

It is an amenable number.

1997486188 is a deficient number, since it is larger than the sum of its proper divisors (1682093772).

1997486188 is a wasteful number, since it uses less digits than its factorization.

1997486188 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26282736 (or 26282734 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 61.

The square root of 1997486188 is about 44693.2454404466. The cubic root of 1997486188 is about 1259.3929611380.

The spelling of 1997486188 in words is "one billion, nine hundred ninety-seven million, four hundred eighty-six thousand, one hundred eighty-eight".