989928819 has 48 divisors (see below), whose sum is σ = 1676488320. Its totient is φ = 556174080.

The previous prime is 989928817. The next prime is 989928839. The reversal of 989928819 is 918829989.

989928819 = T₂ + T₃ + ... + T₁₈₁₀.

989928819 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 989928819 - 2¹ = 989928817 is a prime.

It is a super-2 number, since 2×989928819² = 1959918133373469522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (989928817) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 108372 + ... + 117150.

It is an arithmetic number, because the mean of its divisors is an integer number (34926840).

Almost surely, 2^989928819 is an apocalyptic number.

989928819 is a gapful number since it is divisible by the number (99) formed by its first and last digit.

989928819 is a deficient number, since it is larger than the sum of its proper divisors (686559501).

989928819 is a wasteful number, since it uses less digits than its factorization.

989928819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8880 (or 8877 counting only the distinct ones).

The product of its digits is 6718464, while the sum is 63.

The square root of 989928819 is about 31463.1342844288. The cubic root of 989928819 is about 996.6316063301.

The spelling of 989928819 in words is "nine hundred eighty-nine million, nine hundred twenty-eight thousand, eight hundred nineteen".