2878978 has 8 divisors (see below), whose sum is σ = 4347900. Its totient is φ = 1429680.

The previous prime is 2878973. The next prime is 2878999. The reversal of 2878978 is 8798782.

2878978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1951609 + 927369 = 1397^2 + 963^2 .

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

It is not an unprimeable number, because it can be changed into a prime (2878973) 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 3 ways as a sum of consecutive naturals, for example, 4533 + ... + 5128.

2^2878978 is an apocalyptic number.

2878978 is a deficient number, since it is larger than the sum of its proper divisors (1468922).

2878978 is a wasteful number, since it uses less digits than its factorization.

2878978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9812.

The product of its digits is 451584, while the sum is 49.

The square root of 2878978 is about 1696.7551384923. The cubic root of 2878978 is about 142.2589008137.

The spelling of 2878978 in words is "two million, eight hundred seventy-eight thousand, nine hundred seventy-eight".