8123242780 has 24 divisors (see below), whose sum is σ = 17647045920. Its totient is φ = 3137252160.

The previous prime is 8123242763. The next prime is 8123242783. The reversal of 8123242780 is 872423218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8123242783) 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 7 ways as a sum of consecutive naturals, for example, 7002216 + ... + 7003375.

It is an arithmetic number, because the mean of its divisors is an integer number (735293580).

Almost surely, 2^8123242780 is an apocalyptic number.

It is an amenable number.

8123242780 is an abundant number, since it is smaller than the sum of its proper divisors (9523803140).

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

8123242780 is a wasteful number, since it uses less digits than its factorization.

8123242780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14005629 (or 14005627 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 8123242780 is about 90129.0340567345. The cubic root of 8123242780 is about 2010.2179396202.

Adding to 8123242780 its reverse (872423218), we get a palindrome (8995665998).

The spelling of 8123242780 in words is "eight billion, one hundred twenty-three million, two hundred forty-two thousand, seven hundred eighty".