2889945 has 16 divisors (see below), whose sum is σ = 5137920. Its totient is φ = 1541232.

The previous prime is 2889923. The next prime is 2889947. The reversal of 2889945 is 5499882.

It is not a de Polignac number, because 2889945 - 2²¹ = 792793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 2889945.

It is not an unprimeable number, because it can be changed into a prime (2889947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10569 + ... + 10838.

It is an arithmetic number, because the mean of its divisors is an integer number (321120).

2^2889945 is an apocalyptic number.

It is an amenable number.

2889945 is a deficient number, since it is larger than the sum of its proper divisors (2247975).

2889945 is a wasteful number, since it uses less digits than its factorization.

2889945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21421 (or 21415 counting only the distinct ones).

The product of its digits is 207360, while the sum is 45.

The square root of 2889945 is about 1699.9838234524. The cubic root of 2889945 is about 142.4393093356.

The spelling of 2889945 in words is "two million, eight hundred eighty-nine thousand, nine hundred forty-five".