1988680859 has 24 divisors (see below), whose sum is σ = 2321796960. Its totient is φ = 1696175360.

The previous prime is 1988680817. The next prime is 1988680891. The reversal of 1988680859 is 9580868891.

It is not a de Polignac number, because 1988680859 - 2¹⁶ = 1988615323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1988640859) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 737117 + ... + 739809.

It is an arithmetic number, because the mean of its divisors is an integer number (96741540).

Almost surely, 2^1988680859 is an apocalyptic number.

1988680859 is a deficient number, since it is larger than the sum of its proper divisors (333116101).

1988680859 is a wasteful number, since it uses less digits than its factorization.

1988680859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3091 (or 3080 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 62.

The square root of 1988680859 is about 44594.6281406180. The cubic root of 1988680859 is about 1257.5396810516.

The spelling of 1988680859 in words is "one billion, nine hundred eighty-eight million, six hundred eighty thousand, eight hundred fifty-nine".