12340428772 has 24 divisors (see below), whose sum is σ = 24685923584. Its totient is φ = 5287669632.

The previous prime is 12340428739. The next prime is 12340428791. The reversal of 12340428772 is 27782404321.

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, 102028 + ... + 187324.

Almost surely, 2^12340428772 is an apocalyptic number.

It is an amenable number.

12340428772 is an abundant number, since it is smaller than the sum of its proper divisors (12345494812).

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

12340428772 is a wasteful number, since it uses less digits than its factorization.

12340428772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90475 (or 90473 counting only the distinct ones).

The product of its (nonzero) digits is 150528, while the sum is 40.

The spelling of 12340428772 in words is "twelve billion, three hundred forty million, four hundred twenty-eight thousand, seven hundred seventy-two".