12403239280 has 20 divisors (see below), whose sum is σ = 28837531512. Its totient is φ = 4961295680.

The previous prime is 12403239269. The next prime is 12403239313. The reversal of 12403239280 is 8293230421.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

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, 77520166 + ... + 77520325.

Almost surely, 2^12403239280 is an apocalyptic number.

12403239280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12403239280 is an abundant number, since it is smaller than the sum of its proper divisors (16434292232).

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

12403239280 is a wasteful number, since it uses less digits than its factorization.

12403239280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155040504 (or 155040498 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 34.

The spelling of 12403239280 in words is "twelve billion, four hundred three million, two hundred thirty-nine thousand, two hundred eighty".