6923220638 has 8 divisors (see below), whose sum is σ = 10719825600. Its totient is φ = 3349945440.

The previous prime is 6923220631. The next prime is 6923220659. The reversal of 6923220638 is 8360223296.

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

It is a junction number, because it is equal to n+sod(n) for n = 6923220595 and 6923220604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6923220631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55832363 + ... + 55832486.

It is an arithmetic number, because the mean of its divisors is an integer number (1339978200).

Almost surely, 2^6923220638 is an apocalyptic number.

6923220638 is a deficient number, since it is larger than the sum of its proper divisors (3796604962).

6923220638 is a wasteful number, since it uses less digits than its factorization.

6923220638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111664882.

The product of its (nonzero) digits is 186624, while the sum is 41.

The square root of 6923220638 is about 83205.8930485095. The cubic root of 6923220638 is about 1905.9114720279.

The spelling of 6923220638 in words is "six billion, nine hundred twenty-three million, two hundred twenty thousand, six hundred thirty-eight".