1997163528 has 32 divisors (see below), whose sum is σ = 4994991360. Its totient is φ = 665443520.

The previous prime is 1997163523. The next prime is 1997163563. The reversal of 1997163528 is 8253617991.

It is not an unprimeable number, because it can be changed into a prime (1997163523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46126 + ... + 78242.

It is an arithmetic number, because the mean of its divisors is an integer number (156093480).

Almost surely, 2^1997163528 is an apocalyptic number.

It is an amenable number.

1997163528 is an abundant number, since it is smaller than the sum of its proper divisors (2997827832).

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

1997163528 is a wasteful number, since it uses less digits than its factorization.

1997163528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34717 (or 34713 counting only the distinct ones).

The product of its digits is 816480, while the sum is 51.

The square root of 1997163528 is about 44689.6355769433. The cubic root of 1997163528 is about 1259.3251462987.

The spelling of 1997163528 in words is "one billion, nine hundred ninety-seven million, one hundred sixty-three thousand, five hundred twenty-eight".