1997795328 has 104 divisors (see below), whose sum is σ = 5353375488. Its totient is φ = 662618112.

The previous prime is 1997795291. The next prime is 1997795333. The reversal of 1997795328 is 8235977991.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4509475 + ... + 4509917.

Almost surely, 2^1997795328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997795328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2676687744).

1997795328 is an abundant number, since it is smaller than the sum of its proper divisors (3355580160).

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

1997795328 is an equidigital number, since it uses as much as digits as its factorization.

1997795328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837 (or 815 counting only the distinct ones).

The product of its digits is 8573040, while the sum is 60.

The square root of 1997795328 is about 44696.7037710836. The cubic root of 1997795328 is about 1259.4579275709.

The spelling of 1997795328 in words is "one billion, nine hundred ninety-seven million, seven hundred ninety-five thousand, three hundred twenty-eight".