8123438406 has 16 divisors (see below), whose sum is σ = 17202575664. Its totient is φ = 2548529664.

The previous prime is 8123438377. The next prime is 8123438437. The reversal of 8123438406 is 6048343218.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39820675 + ... + 39820878.

It is an arithmetic number, because the mean of its divisors is an integer number (1075160979).

Almost surely, 2^8123438406 is an apocalyptic number.

8123438406 is an abundant number, since it is smaller than the sum of its proper divisors (9079137258).

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

8123438406 is a wasteful number, since it uses less digits than its factorization.

8123438406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79641575.

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 8123438406 is about 90130.1193053687. The cubic root of 8123438406 is about 2010.2340763507.

The spelling of 8123438406 in words is "eight billion, one hundred twenty-three million, four hundred thirty-eight thousand, four hundred six".