2889978 has 64 divisors (see below), whose sum is σ = 7311360. Its totient is φ = 741312.

The previous prime is 2889947. The next prime is 2889979. The reversal of 2889978 is 8799882.

2889978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 2889978.

It is not an unprimeable number, because it can be changed into a prime (2889979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36543 + ... + 36621.

It is an arithmetic number, because the mean of its divisors is an integer number (114240).

2^2889978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2889978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3655680).

2889978 is an abundant number, since it is smaller than the sum of its proper divisors (4421382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2889978 is a wasteful number, since it uses less digits than its factorization.

2889978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 171.

The product of its digits is 580608, while the sum is 51.

The square root of 2889978 is about 1699.9935293995. The cubic root of 2889978 is about 142.4398515004.

The spelling of 2889978 in words is "two million, eight hundred eighty-nine thousand, nine hundred seventy-eight".