2478446447 has 4 divisors (see below), whose sum is σ = 2478703416. Its totient is φ = 2478189480.

The previous prime is 2478446437. The next prime is 2478446449. The reversal of 2478446447 is 7446448742.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2478446447 - 2¹⁰ = 2478445423 is a prime.

It is a super-2 number, since 2×2478446447² = 12285393581293847618, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2478446395 and 2478446404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478446449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113429 + ... + 133502.

It is an arithmetic number, because the mean of its divisors is an integer number (619675854).

Almost surely, 2^2478446447 is an apocalyptic number.

2478446447 is a deficient number, since it is larger than the sum of its proper divisors (256969).

2478446447 is a wasteful number, since it uses less digits than its factorization.

2478446447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256968.

The product of its digits is 4816896, while the sum is 50.

The square root of 2478446447 is about 49783.9979009320. The cubic root of 2478446447 is about 1353.2971891644.

The spelling of 2478446447 in words is "two billion, four hundred seventy-eight million, four hundred forty-six thousand, four hundred forty-seven".