1988274587 has 16 divisors (see below), whose sum is σ = 2220916992. Its totient is φ = 1768003200.

The previous prime is 1988274581. The next prime is 1988274601. The reversal of 1988274587 is 7854728891.

It is a cyclic number.

It is not a de Polignac number, because 1988274587 - 2⁶ = 1988274523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1988274581) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28118 + ... + 69044.

It is an arithmetic number, because the mean of its divisors is an integer number (138807312).

Almost surely, 2^1988274587 is an apocalyptic number.

1988274587 is a deficient number, since it is larger than the sum of its proper divisors (232642405).

1988274587 is a wasteful number, since it uses less digits than its factorization.

1988274587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41078.

The product of its digits is 9031680, while the sum is 59.

The square root of 1988274587 is about 44590.0727404654. The cubic root of 1988274587 is about 1257.4540400342.

The spelling of 1988274587 in words is "one billion, nine hundred eighty-eight million, two hundred seventy-four thousand, five hundred eighty-seven".