8123306780 has 24 divisors (see below), whose sum is σ = 17227848960. Its totient is φ = 3217150400.

The previous prime is 8123306771. The next prime is 8123306803. The reversal of 8123306780 is 876033218.

It is a happy number.

It is a super-2 number, since 2×8123306780² (a number of 21 digits) contains 22 as substring.

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, 2008700 + ... + 2012739.

It is an arithmetic number, because the mean of its divisors is an integer number (717827040).

Almost surely, 2^8123306780 is an apocalyptic number.

It is an amenable number.

8123306780 is an abundant number, since it is smaller than the sum of its proper divisors (9104542180).

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

8123306780 is a wasteful number, since it uses less digits than its factorization.

8123306780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4021549 (or 4021547 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 8123306780 is about 90129.3891025563. The cubic root of 8123306780 is about 2010.2232188588.

Adding to 8123306780 its reverse (876033218), we get a palindrome (8999339998).

The spelling of 8123306780 in words is "eight billion, one hundred twenty-three million, three hundred six thousand, seven hundred eighty".