987578842 has 16 divisors (see below), whose sum is σ = 1548518400. Its totient is φ = 471809520.

The previous prime is 987578819. The next prime is 987578843. The reversal of 987578842 is 248875789.

It is not an unprimeable number, because it can be changed into a prime (987578843) 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 7 ways as a sum of consecutive naturals, for example, 95917 + ... + 105712.

It is an arithmetic number, because the mean of its divisors is an integer number (96782400).

Almost surely, 2^987578842 is an apocalyptic number.

987578842 is a deficient number, since it is larger than the sum of its proper divisors (560939558).

987578842 is a wasteful number, since it uses less digits than its factorization.

987578842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201741.

The product of its digits is 9031680, while the sum is 58.

The square root of 987578842 is about 31425.7671664512. The cubic root of 987578842 is about 995.8423519189.

The spelling of 987578842 in words is "nine hundred eighty-seven million, five hundred seventy-eight thousand, eight hundred forty-two".