12040350728 has 16 divisors (see below), whose sum is σ = 25800751680. Its totient is φ = 5160150288.

The previous prime is 12040350689. The next prime is 12040350767. The reversal of 12040350728 is 82705304021.

It is an interprime number because it is at equal distance from previous prime (12040350689) and next prime (12040350767).

It is a junction number, because it is equal to n+sod(n) for n = 12040350694 and 12040350703.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107503076 + ... + 107503187.

It is an arithmetic number, because the mean of its divisors is an integer number (1612546980).

Almost surely, 2^12040350728 is an apocalyptic number.

It is an amenable number.

12040350728 is an abundant number, since it is smaller than the sum of its proper divisors (13760400952).

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

12040350728 is a wasteful number, since it uses less digits than its factorization.

12040350728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215006276 (or 215006272 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 32.

Adding to 12040350728 its reverse (82705304021), we get a palindrome (94745654749).

The spelling of 12040350728 in words is "twelve billion, forty million, three hundred fifty thousand, seven hundred twenty-eight".