1997932028 has 12 divisors (see below), whose sum is σ = 3503505432. Its totient is φ = 996930480.

The previous prime is 1997932019. The next prime is 1997932033. The reversal of 1997932028 is 8202397991.

It is a congruent number.

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, 506675 + ... + 510602.

It is an arithmetic number, because the mean of its divisors is an integer number (291958786).

Almost surely, 2^1997932028 is an apocalyptic number.

It is an amenable number.

1997932028 is a deficient number, since it is larger than the sum of its proper divisors (1505573404).

1997932028 is a wasteful number, since it uses less digits than its factorization.

1997932028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1017772 (or 1017770 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 50.

The square root of 1997932028 is about 44698.2329404642. The cubic root of 1997932028 is about 1259.4866532315.

The spelling of 1997932028 in words is "one billion, nine hundred ninety-seven million, nine hundred thirty-two thousand, twenty-eight".