3012209928 has 144 divisors (see below), whose sum is σ = 10220153580. Its totient is φ = 794416896.

The previous prime is 3012209917. The next prime is 3012209929. The reversal of 3012209928 is 8299022103.

It can be written as a sum of positive squares in 2 ways, for example, as 2586943044 + 425266884 = 50862^2 + 20622^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 3012209892 and 3012209901.

It is not an unprimeable number, because it can be changed into a prime (3012209929) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 13026 + ... + 78702.

Almost surely, 2^3012209928 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 3012209928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5110076790).

3012209928 is an abundant number, since it is smaller than the sum of its proper divisors (7207943652).

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

3012209928 is a wasteful number, since it uses less digits than its factorization.

3012209928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65716 (or 65702 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 3012209928 is about 54883.6034531261. The cubic root of 3012209928 is about 1444.2035621792.

The spelling of 3012209928 in words is "three billion, twelve million, two hundred nine thousand, nine hundred twenty-eight".