7284138447 has 4 divisors (see below), whose sum is σ = 9712184600. Its totient is φ = 4856092296.

The previous prime is 7284138403. The next prime is 7284138451. The reversal of 7284138447 is 7448314827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7448314827 = 3 ⋅2482771609.

It is not a de Polignac number, because 7284138447 - 2⁶ = 7284138383 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 7284138396 and 7284138405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7284138457) 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 3 ways as a sum of consecutive naturals, for example, 1214023072 + ... + 1214023077.

It is an arithmetic number, because the mean of its divisors is an integer number (2428046150).

Almost surely, 2^7284138447 is an apocalyptic number.

7284138447 is a deficient number, since it is larger than the sum of its proper divisors (2428046153).

7284138447 is a wasteful number, since it uses less digits than its factorization.

7284138447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2428046152.

The product of its digits is 1204224, while the sum is 48.

The square root of 7284138447 is about 85347.1642586911. The cubic root of 7284138447 is about 1938.4713971911.

The spelling of 7284138447 in words is "seven billion, two hundred eighty-four million, one hundred thirty-eight thousand, four hundred forty-seven".