1997895530 has 16 divisors (see below), whose sum is σ = 3598653960. Its totient is φ = 798615552.

The previous prime is 1997895527. The next prime is 1997895563. The reversal of 1997895530 is 355987991.

It can be written as a sum of positive squares in 4 ways, for example, as 1781599681 + 216295849 = 42209^2 + 14707^2 .

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 7 ways as a sum of consecutive naturals, for example, 52199 + ... + 81978.

Almost surely, 2^1997895530 is an apocalyptic number.

1997895530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1997895530 is a deficient number, since it is larger than the sum of its proper divisors (1600758430).

1997895530 is a wasteful number, since it uses less digits than its factorization.

1997895530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135673.

The product of its (nonzero) digits is 3061800, while the sum is 56.

The square root of 1997895530 is about 44697.8246674265. The cubic root of 1997895530 is about 1259.4789837975.

The spelling of 1997895530 in words is "one billion, nine hundred ninety-seven million, eight hundred ninety-five thousand, five hundred thirty".