2928889209 has 4 divisors (see below), whose sum is σ = 3905185616. Its totient is φ = 1952592804.

The previous prime is 2928889193. The next prime is 2928889219. The reversal of 2928889209 is 9029888292.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2928889209 - 2⁴ = 2928889193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2928889219) 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, 488148199 + ... + 488148204.

It is an arithmetic number, because the mean of its divisors is an integer number (976296404).

Almost surely, 2^2928889209 is an apocalyptic number.

It is an amenable number.

2928889209 is a deficient number, since it is larger than the sum of its proper divisors (976296407).

2928889209 is an equidigital number, since it uses as much as digits as its factorization.

2928889209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 976296406.

The product of its (nonzero) digits is 2985984, while the sum is 57.

The square root of 2928889209 is about 54119.2129377359. The cubic root of 2928889209 is about 1430.7628265745.

The spelling of 2928889209 in words is "two billion, nine hundred twenty-eight million, eight hundred eighty-nine thousand, two hundred nine".