1988861524 has 48 divisors (see below), whose sum is σ = 3802839040. Its totient is φ = 904659840.

The previous prime is 1988861509. The next prime is 1988861531. The reversal of 1988861524 is 4251688891.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 1195117 + ... + 1196779.

Almost surely, 2^1988861524 is an apocalyptic number.

It is an amenable number.

1988861524 is a deficient number, since it is larger than the sum of its proper divisors (1813977516).

1988861524 is a wasteful number, since it uses less digits than its factorization.

1988861524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2000 (or 1998 counting only the distinct ones).

The product of its digits is 1105920, while the sum is 52.

The square root of 1988861524 is about 44596.6537309695. The cubic root of 1988861524 is about 1257.5777609889.

The spelling of 1988861524 in words is "one billion, nine hundred eighty-eight million, eight hundred sixty-one thousand, five hundred twenty-four".