12295725728 has 144 divisors (see below), whose sum is σ = 30342369960. Its totient is φ = 4855234560.

The previous prime is 12295725719. The next prime is 12295725737. The reversal of 12295725728 is 82752759221.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (12295725719) and next prime (12295725737).

It can be written as a sum of positive squares in 4 ways, for example, as 10537433104 + 1758292624 = 102652^2 + 41932^2 .

It is a super-2 number, since 2×12295725728² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 848528 + ... + 862896.

Almost surely, 2^12295725728 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12295725728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15171184980).

12295725728 is an abundant number, since it is smaller than the sum of its proper divisors (18046644232).

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

12295725728 is a wasteful number, since it uses less digits than its factorization.

12295725728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14431 (or 14412 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 50.

The spelling of 12295725728 in words is "twelve billion, two hundred ninety-five million, seven hundred twenty-five thousand, seven hundred twenty-eight".