3078665728 has 80 divisors (see below), whose sum is σ = 6672791664. Its totient is φ = 1413283840.

The previous prime is 3078665717. The next prime is 3078665729. The reversal of 3078665728 is 8275668703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3078665729) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352551 + ... + 361177.

Almost surely, 2^3078665728 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 3078665728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3336395832).

3078665728 is an abundant number, since it is smaller than the sum of its proper divisors (3594125936).

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

3078665728 is an equidigital number, since it uses as much as digits as its factorization.

3078665728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8703 (or 8687 counting only the distinct ones).

The product of its (nonzero) digits is 3386880, while the sum is 52.

The square root of 3078665728 is about 55485.7254435769. The cubic root of 3078665728 is about 1454.7471410633.

The spelling of 3078665728 in words is "three billion, seventy-eight million, six hundred sixty-five thousand, seven hundred twenty-eight".