1987648558 has 32 divisors (see below), whose sum is σ = 3589747200. Its totient is φ = 806337504.

The previous prime is 1987648543. The next prime is 1987648561. The reversal of 1987648558 is 8558467891.

It is a junction number, because it is equal to n+sod(n) for n = 1987648496 and 1987648505.

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, 422463 + ... + 427141.

It is an arithmetic number, because the mean of its divisors is an integer number (112179600).

Almost surely, 2^1987648558 is an apocalyptic number.

1987648558 is a deficient number, since it is larger than the sum of its proper divisors (1602098642).

1987648558 is a wasteful number, since it uses less digits than its factorization.

1987648558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6304.

The product of its digits is 19353600, while the sum is 61.

The square root of 1987648558 is about 44583.0523629776. The cubic root of 1987648558 is about 1257.3220520055.

The spelling of 1987648558 in words is "one billion, nine hundred eighty-seven million, six hundred forty-eight thousand, five hundred fifty-eight".