2478387449 has 8 divisors (see below), whose sum is σ = 2660123880. Its totient is φ = 2300645376.

The previous prime is 2478387421. The next prime is 2478387451. The reversal of 2478387449 is 9447838742.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 741581824 + 1736805625 = 27232^2 + 41675^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2478387449 - 2²⁴ = 2461610233 is a prime.

It is a super-2 number, since 2×2478387449² = 12284808694721455202, 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 = 2478387394 and 2478387403.

It is not an unprimeable number, because it can be changed into a prime (2478380449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 997304 + ... + 999785.

It is an arithmetic number, because the mean of its divisors is an integer number (332515485).

Almost surely, 2^2478387449 is an apocalyptic number.

It is an amenable number.

2478387449 is a deficient number, since it is larger than the sum of its proper divisors (181736431).

2478387449 is a wasteful number, since it uses less digits than its factorization.

2478387449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1997179.

The product of its digits is 10838016, while the sum is 56.

The square root of 2478387449 is about 49783.4053576089. The cubic root of 2478387449 is about 1353.2864509240.

The spelling of 2478387449 in words is "two billion, four hundred seventy-eight million, three hundred eighty-seven thousand, four hundred forty-nine".