987389836 has 12 divisors (see below), whose sum is σ = 1740364360. Its totient is φ = 490142880.

The previous prime is 987389833. The next prime is 987389863. The reversal of 987389836 is 638983789.

It is a super-2 number, since 2×987389836² = 1949877376472213792, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (987389833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 887385 + ... + 888496.

Almost surely, 2^987389836 is an apocalyptic number.

It is an amenable number.

987389836 is a deficient number, since it is larger than the sum of its proper divisors (752974524).

987389836 is a wasteful number, since it uses less digits than its factorization.

987389836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1776024 (or 1776022 counting only the distinct ones).

The product of its digits is 15676416, while the sum is 61.

The square root of 987389836 is about 31422.7598405996. The cubic root of 987389836 is about 995.7788187000.

The spelling of 987389836 in words is "nine hundred eighty-seven million, three hundred eighty-nine thousand, eight hundred thirty-six".