1998987602 has 8 divisors (see below), whose sum is σ = 3174862716. Its totient is φ = 940700032.

The previous prime is 1998987593. The next prime is 1998987647. The reversal of 1998987602 is 2067898991.

It can be written as a sum of positive squares in 2 ways, for example, as 1998179401 + 808201 = 44701^2 + 899^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29396843 + ... + 29396910.

Almost surely, 2^1998987602 is an apocalyptic number.

1998987602 is a deficient number, since it is larger than the sum of its proper divisors (1175875114).

1998987602 is a wasteful number, since it uses less digits than its factorization.

1998987602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58793772.

The product of its (nonzero) digits is 3919104, while the sum is 59.

The square root of 1998987602 is about 44710.0391634809. The cubic root of 1998987602 is about 1259.7084237553.

The spelling of 1998987602 in words is "one billion, nine hundred ninety-eight million, nine hundred eighty-seven thousand, six hundred two".