7722381438 has 24 divisors (see below), whose sum is σ = 17120940408. Its totient is φ = 2514263472.

The previous prime is 7722381419. The next prime is 7722381473. The reversal of 7722381438 is 8341832277.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7722381393 and 7722381402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4987845 + ... + 4989392.

It is an arithmetic number, because the mean of its divisors is an integer number (713372517).

Almost surely, 2^7722381438 is an apocalyptic number.

7722381438 is an abundant number, since it is smaller than the sum of its proper divisors (9398558970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7722381438 is a wasteful number, since it uses less digits than its factorization.

7722381438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9977288 (or 9977285 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 7722381438 is about 87877.0814148945. The cubic root of 7722381438 is about 1976.5922267147.

The spelling of 7722381438 in words is "seven billion, seven hundred twenty-two million, three hundred eighty-one thousand, four hundred thirty-eight".