989838387 has 22 divisors (see below), whose sum is σ = 1484837772. Its totient is φ = 659852892.

The previous prime is 989838361. The next prime is 989838391. The reversal of 989838387 is 783838989.

989838387 is a `hidden beast` number, since 98 + 98 + 383 + 87 = 666.

It is not a de Polignac number, because 989838387 - 2⁷ = 989838259 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (989838287) by changing a digit.

It is a polite number, since it can be written in 21 ways as a sum of consecutive naturals, for example, 50668 + ... + 67430.

It is an arithmetic number, because the mean of its divisors is an integer number (67492626).

Almost surely, 2^989838387 is an apocalyptic number.

989838387 is a deficient number, since it is larger than the sum of its proper divisors (494999385).

989838387 is an frugal number, since it uses more digits than its factorization.

989838387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16793 (or 16766 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 63.

The square root of 989838387 is about 31461.6971411270. The cubic root of 989838387 is about 996.6012573015.

The spelling of 989838387 in words is "nine hundred eighty-nine million, eight hundred thirty-eight thousand, three hundred eighty-seven".