12019728 has 80 divisors (see below), whose sum is σ = 35997696. Its totient is φ = 3384960.

The previous prime is 12019703. The next prime is 12019729. The reversal of 12019728 is 82791021.

It is a super-2 number, since 2×12019728² = 288947722387968, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12019695 and 12019704.

It is not an unprimeable number, because it can be changed into a prime (12019729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27673 + ... + 28103.

Almost surely, 2^12019728 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 12019728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17998848).

12019728 is an abundant number, since it is smaller than the sum of its proper divisors (23977968).

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

12019728 is a wasteful number, since it uses less digits than its factorization.

12019728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 532 (or 526 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 12019728 is about 3466.9479373074. The cubic root of 12019728 is about 229.0682405019.

The spelling of 12019728 in words is "twelve million, nineteen thousand, seven hundred twenty-eight".