1997335544 has 16 divisors (see below), whose sum is σ = 3748192920. Its totient is φ = 997817440.

The previous prime is 1997335519. The next prime is 1997335567. The reversal of 1997335544 is 4455337991.

It is a junction number, because it is equal to n+sod(n) for n = 1997335492 and 1997335501.

It is a congruent number.

It is an unprimeable number.

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, 96254 + ... + 115149.

Almost surely, 2^1997335544 is an apocalyptic number.

It is an amenable number.

1997335544 is a deficient number, since it is larger than the sum of its proper divisors (1750857376).

1997335544 is a wasteful number, since it uses less digits than its factorization.

1997335544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212590 (or 212586 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 50.

The square root of 1997335544 is about 44691.5600980767. The cubic root of 1997335544 is about 1259.3613005498.

The spelling of 1997335544 in words is "one billion, nine hundred ninety-seven million, three hundred thirty-five thousand, five hundred forty-four".