2878945 has 8 divisors (see below), whose sum is σ = 3465000. Its totient is φ = 2296320.

The previous prime is 2878921. The next prime is 2878957. The reversal of 2878945 is 5498782.

It can be written as a sum of positive squares in 4 ways, for example, as 96721 + 2782224 = 311^2 + 1668^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2878945 - 2¹³ = 2870753 is a prime.

It is a d-powerful number, because it can be written as 2²¹ + 8⁴ + 7³ + 8⁶ + 9⁵ + 4⁸ + 5⁸ .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1681 + ... + 2929.

It is an arithmetic number, because the mean of its divisors is an integer number (433125).

2^2878945 is an apocalyptic number.

It is an amenable number.

2878945 is a deficient number, since it is larger than the sum of its proper divisors (586055).

2878945 is a wasteful number, since it uses less digits than its factorization.

2878945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1715.

The product of its digits is 161280, while the sum is 43.

The square root of 2878945 is about 1696.7454140206. The cubic root of 2878945 is about 142.2583572688.

The spelling of 2878945 in words is "two million, eight hundred seventy-eight thousand, nine hundred forty-five".