7822821442 has 4 divisors (see below), whose sum is σ = 11734232166. Its totient is φ = 3911410720.

The previous prime is 7822821437. The next prime is 7822821481. The reversal of 7822821442 is 2441282287.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2441282287 = 4679 ⋅521753.

It can be written as a sum of positive squares in only one way, i.e., 6115396401 + 1707425041 = 78201^2 + 41321^2 .

It is a super-2 number, since 2×7822821442² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7822821395 and 7822821404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1955705359 + ... + 1955705362.

Almost surely, 2^7822821442 is an apocalyptic number.

7822821442 is a deficient number, since it is larger than the sum of its proper divisors (3911410724).

7822821442 is a wasteful number, since it uses less digits than its factorization.

7822821442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3911410723.

The product of its digits is 114688, while the sum is 40.

The square root of 7822821442 is about 88446.7152697035. The cubic root of 7822821442 is about 1985.1247580456.

The spelling of 7822821442 in words is "seven billion, eight hundred twenty-two million, eight hundred twenty-one thousand, four hundred forty-two".