1988085538 has 16 divisors (see below), whose sum is σ = 3008416320. Its totient is φ = 985316400.

The previous prime is 1988085529. The next prime is 1988085551. The reversal of 1988085538 is 8355808891.

It is a happy number.

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, 103753 + ... + 121411.

It is an arithmetic number, because the mean of its divisors is an integer number (188026020).

Almost surely, 2^1988085538 is an apocalyptic number.

1988085538 is a deficient number, since it is larger than the sum of its proper divisors (1020330782).

1988085538 is a wasteful number, since it uses less digits than its factorization.

1988085538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18153.

The product of its (nonzero) digits is 2764800, while the sum is 55.

The square root of 1988085538 is about 44587.9528348185. The cubic root of 1988085538 is about 1257.4141850488.

The spelling of 1988085538 in words is "one billion, nine hundred eighty-eight million, eighty-five thousand, five hundred thirty-eight".