2439978 has 16 divisors (see below), whose sum is σ = 5092416. Its totient is φ = 777920.

The previous prime is 2439977. The next prime is 2439989. The reversal of 2439978 is 8799342.

2439978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2439977) 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 7 ways as a sum of consecutive naturals, for example, 8703 + ... + 8978.

It is an arithmetic number, because the mean of its divisors is an integer number (318276).

2^2439978 is an apocalyptic number.

2439978 is an abundant number, since it is smaller than the sum of its proper divisors (2652438).

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

2439978 is a wasteful number, since it uses less digits than its factorization.

2439978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17709.

The product of its digits is 108864, while the sum is 42.

The square root of 2439978 is about 1562.0428931371. The cubic root of 2439978 is about 134.6259053295.

The spelling of 2439978 in words is "two million, four hundred thirty-nine thousand, nine hundred seventy-eight".