1988205530 has 8 divisors (see below), whose sum is σ = 3578769972. Its totient is φ = 795282208.

The previous prime is 1988205529. The next prime is 1988205547. The reversal of 1988205530 is 355028891.

It can be written as a sum of positive squares in 2 ways, for example, as 1982119441 + 6086089 = 44521^2 + 2467^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×1988205530² = 7905922459045161800, which contains 22 as substring.

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, 99410267 + ... + 99410286.

Almost surely, 2^1988205530 is an apocalyptic number.

1988205530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1988205530 is a deficient number, since it is larger than the sum of its proper divisors (1590564442).

1988205530 is a wasteful number, since it uses less digits than its factorization.

1988205530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198820560.

The product of its (nonzero) digits is 86400, while the sum is 41.

The square root of 1988205530 is about 44589.2983797682. The cubic root of 1988205530 is about 1257.4394818490.

The spelling of 1988205530 in words is "one billion, nine hundred eighty-eight million, two hundred five thousand, five hundred thirty".