2447978 has 8 divisors (see below), whose sum is σ = 3954468. Its totient is φ = 1129824.

The previous prime is 2447971. The next prime is 2447981. The reversal of 2447978 is 8797442.

2447978 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 2301289 + 146689 = 1517^2 + 383^2 .

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 (2447971) 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, 47051 + ... + 47102.

2^2447978 is an apocalyptic number.

2447978 is a deficient number, since it is larger than the sum of its proper divisors (1506490).

2447978 is a wasteful number, since it uses less digits than its factorization.

2447978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94168.

The product of its digits is 112896, while the sum is 41.

The square root of 2447978 is about 1564.6015467204. The cubic root of 2447978 is about 134.7728782823.

The spelling of 2447978 in words is "two million, four hundred forty-seven thousand, nine hundred seventy-eight".